diff --git a/gcc/fortran/arith.c b/gcc/fortran/arith.c
index 92067ac..8f328fe 100644
--- a/gcc/fortran/arith.c
+++ b/gcc/fortran/arith.c
@@ -980,7 +980,7 @@ static arith
 gfc_arith_concat (gfc_expr *op1, gfc_expr *op2, gfc_expr **resultp)
 {
   gfc_expr *result;
-  int len;
+  size_t len;
 
   gcc_assert (op1->ts.kind == op2->ts.kind);
   result = gfc_get_constant_expr (BT_CHARACTER, op1->ts.kind,
@@ -1089,7 +1089,7 @@ compare_complex (gfc_expr *op1, gfc_expr *op2)
 int
 gfc_compare_string (gfc_expr *a, gfc_expr *b)
 {
-  int len, alen, blen, i;
+  size_t len, alen, blen, i;
   gfc_char_t ac, bc;
 
   alen = a->value.character.length;
@@ -1116,7 +1116,7 @@ gfc_compare_string (gfc_expr *a, gfc_expr *b)
 int
 gfc_compare_with_Cstring (gfc_expr *a, const char *b, bool case_sensitive)
 {
-  int len, alen, blen, i;
+  size_t len, alen, blen, i;
   gfc_char_t ac, bc;
 
   alen = a->value.character.length;
diff --git a/gcc/fortran/array.c b/gcc/fortran/array.c
index 882fe57..ed5fdb2 100644
--- a/gcc/fortran/array.c
+++ b/gcc/fortran/array.c
@@ -1962,7 +1962,7 @@ bool
 gfc_resolve_character_array_constructor (gfc_expr *expr)
 {
   gfc_constructor *p;
-  int found_length;
+  HOST_WIDE_INT found_length;
 
   gcc_assert (expr->expr_type == EXPR_ARRAY);
   gcc_assert (expr->ts.type == BT_CHARACTER);
@@ -1994,7 +1994,7 @@ got_charlen:
       for (p = gfc_constructor_first (expr->value.constructor);
 	   p; p = gfc_constructor_next (p))
 	{
-	  int current_length = -1;
+	  HOST_WIDE_INT current_length = -1;
 	  gfc_ref *ref;
 	  for (ref = p->expr->ref; ref; ref = ref->next)
 	    if (ref->type == REF_SUBSTRING
@@ -2005,19 +2005,11 @@ got_charlen:
 	  if (p->expr->expr_type == EXPR_CONSTANT)
 	    current_length = p->expr->value.character.length;
 	  else if (ref)
-	    {
-	      long j;
-	      j = mpz_get_ui (ref->u.ss.end->value.integer)
-		- mpz_get_ui (ref->u.ss.start->value.integer) + 1;
-	      current_length = (int) j;
-	    }
+	    current_length = gfc_mpz_get_hwi (ref->u.ss.end->value.integer)
+	      - gfc_mpz_get_hwi (ref->u.ss.start->value.integer) + 1;
 	  else if (p->expr->ts.u.cl && p->expr->ts.u.cl->length
 		   && p->expr->ts.u.cl->length->expr_type == EXPR_CONSTANT)
-	    {
-	      long j;
-	      j = mpz_get_si (p->expr->ts.u.cl->length->value.integer);
-	      current_length = (int) j;
-	    }
+	    current_length = gfc_mpz_get_hwi (p->expr->ts.u.cl->length->value.integer);
 	  else
 	    return true;
 
@@ -2027,9 +2019,10 @@ got_charlen:
 	    found_length = current_length;
 	  else if (found_length != current_length)
 	    {
-	      gfc_error ("Different CHARACTER lengths (%d/%d) in array"
-			 " constructor at %L", found_length, current_length,
-			 &p->expr->where);
+	      gfc_error ("Different CHARACTER lengths ("
+			 HOST_WIDE_INT_PRINT_DEC "/" HOST_WIDE_INT_PRINT_DEC
+			 ") in array constructor at %L", found_length,
+			 current_length, &p->expr->where);
 	      return false;
 	    }
 
@@ -2051,7 +2044,7 @@ got_charlen:
       /* If we've got a constant character length, pad according to this.
 	 gfc_extract_int does check for BT_INTEGER and EXPR_CONSTANT and sets
 	 max_length only if they pass.  */
-      gfc_extract_int (expr->ts.u.cl->length, &found_length);
+      gfc_extract_hwi (expr->ts.u.cl->length, &found_length);
 
       /* Now pad/truncate the elements accordingly to the specified character
 	 length.  This is ok inside this conditional, as in the case above
@@ -2063,13 +2056,13 @@ got_charlen:
 	  if (p->expr->expr_type == EXPR_CONSTANT)
 	    {
 	      gfc_expr *cl = NULL;
-	      int current_length = -1;
+	      HOST_WIDE_INT current_length = -1;
 	      bool has_ts;
 
 	      if (p->expr->ts.u.cl && p->expr->ts.u.cl->length)
 	      {
 		cl = p->expr->ts.u.cl->length;
-		gfc_extract_int (cl, &current_length);
+		gfc_extract_hwi (cl, &current_length);
 	      }
 
 	      /* If gfc_extract_int above set current_length, we implicitly
diff --git a/gcc/fortran/check.c b/gcc/fortran/check.c
index fccb927..40e4b86 100644
--- a/gcc/fortran/check.c
+++ b/gcc/fortran/check.c
@@ -5839,7 +5839,7 @@ bool
 gfc_check_fe_runtime_error (gfc_actual_arglist *a)
 {
   gfc_expr *e;
-  int len, i;
+  size_t len, i;
   int num_percent, nargs;
 
   e = a->expr;
diff --git a/gcc/fortran/data.c b/gcc/fortran/data.c
index 6313f2e..45bb5c0 100644
--- a/gcc/fortran/data.c
+++ b/gcc/fortran/data.c
@@ -104,11 +104,11 @@ static gfc_expr *
 create_character_initializer (gfc_expr *init, gfc_typespec *ts,
 			      gfc_ref *ref, gfc_expr *rvalue)
 {
-  int len, start, end, tlen;
+  HOST_WIDE_INT len, start, end, tlen;
   gfc_char_t *dest;
   bool alloced_init = false;
 	    
-  gfc_extract_int (ts->u.cl->length, &len);
+  gfc_extract_hwi (ts->u.cl->length, &len);
 
   if (init == NULL)
     {
@@ -143,10 +143,10 @@ create_character_initializer (gfc_expr *init, gfc_typespec *ts,
 	  return NULL;
 	}
 
-      gfc_extract_int (start_expr, &start);
+      gfc_extract_hwi (start_expr, &start);
       gfc_free_expr (start_expr);
       start--;
-      gfc_extract_int (end_expr, &end);
+      gfc_extract_hwi (end_expr, &end);
       gfc_free_expr (end_expr);
     }
   else
@@ -174,7 +174,8 @@ create_character_initializer (gfc_expr *init, gfc_typespec *ts,
       else
 	{
 	  gfc_warning_now (0, "Initialization string at %L was truncated to "
-			   "fit the variable (%d/%d)", &rvalue->where,
+			   "fit the variable (" HOST_WIDE_INT_PRINT_DEC "/"
+			   HOST_WIDE_INT_PRINT_DEC ")", &rvalue->where,
 			   tlen, len);
 	  len = tlen;
 	}
@@ -182,8 +183,7 @@ create_character_initializer (gfc_expr *init, gfc_typespec *ts,
 
   if (rvalue->ts.type == BT_HOLLERITH)
     {
-      int i;
-      for (i = 0; i < len; i++)
+      for (size_t i = 0; i < (size_t) len; i++)
 	dest[start+i] = rvalue->representation.string[i];
     }
   else
diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
index cb23534..14c8072 100644
--- a/gcc/fortran/decl.c
+++ b/gcc/fortran/decl.c
@@ -1538,10 +1538,11 @@ build_sym (const char *name, gfc_charlen *cl, bool cl_deferred,
    means no checking.  */
 
 void
-gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
+gfc_set_constant_character_len (gfc_charlen_t len, gfc_expr *expr,
+				gfc_charlen_t check_len)
 {
   gfc_char_t *s;
-  int slen;
+  gfc_charlen_t slen;
 
   if (expr->ts.type != BT_CHARACTER)
     return;
@@ -1564,15 +1565,19 @@ gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
       if (warn_character_truncation && slen > len)
 	gfc_warning_now (OPT_Wcharacter_truncation,
 			 "CHARACTER expression at %L is being truncated "
-			 "(%d/%d)", &expr->where, slen, len);
+			 "(" HOST_WIDE_INT_PRINT_DEC "/"
+			 HOST_WIDE_INT_PRINT_DEC ")", &expr->where,
+			 (HOST_WIDE_INT) slen, (HOST_WIDE_INT) len);
 
       /* Apply the standard by 'hand' otherwise it gets cleared for
 	 initializers.  */
       if (check_len != -1 && slen != check_len
           && !(gfc_option.allow_std & GFC_STD_GNU))
 	gfc_error_now ("The CHARACTER elements of the array constructor "
-		       "at %L must have the same length (%d/%d)",
-			&expr->where, slen, check_len);
+		       "at %L must have the same length ("
+		       HOST_WIDE_INT_PRINT_DEC "/" HOST_WIDE_INT_PRINT_DEC ")",
+		       &expr->where, (HOST_WIDE_INT) slen,
+		       (HOST_WIDE_INT) check_len);
 
       s[len] = '\0';
       free (expr->value.character.string);
@@ -1751,12 +1756,10 @@ add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
 	  /* Update initializer character length according symbol.  */
 	  else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
 	    {
-	      int len;
-
 	      if (!gfc_specification_expr (sym->ts.u.cl->length))
 		return false;
 
-	      len = mpz_get_si (sym->ts.u.cl->length->value.integer);
+	      HOST_WIDE_INT len = gfc_mpz_get_hwi (sym->ts.u.cl->length->value.integer);
 
 	      if (init->expr_type == EXPR_CONSTANT)
 		gfc_set_constant_character_len (len, init, -1);
diff --git a/gcc/fortran/expr.c b/gcc/fortran/expr.c
index a8f0f0f..db2b54f 100644
--- a/gcc/fortran/expr.c
+++ b/gcc/fortran/expr.c
@@ -4088,9 +4088,7 @@ gfc_build_default_init_expr (gfc_typespec *ts, locus *where)
 gfc_expr *
 gfc_build_init_expr (gfc_typespec *ts, locus *where, bool force)
 {
-  int char_len;
   gfc_expr *init_expr;
-  int i;
 
   /* Try to build an initializer expression.  */
   init_expr = gfc_get_constant_expr (ts->type, ts->kind, where);
@@ -4202,10 +4200,10 @@ gfc_build_init_expr (gfc_typespec *ts, locus *where, bool force)
           && ts->u.cl->length
           && ts->u.cl->length->expr_type == EXPR_CONSTANT)
         {
-          char_len = mpz_get_si (ts->u.cl->length->value.integer);
+          HOST_WIDE_INT char_len = gfc_mpz_get_hwi (ts->u.cl->length->value.integer);
           init_expr->value.character.length = char_len;
           init_expr->value.character.string = gfc_get_wide_string (char_len+1);
-          for (i = 0; i < char_len; i++)
+          for (size_t i = 0; i < (size_t) char_len; i++)
             init_expr->value.character.string[i]
               = (unsigned char) gfc_option.flag_init_character_value;
         }
@@ -4255,13 +4253,11 @@ gfc_apply_init (gfc_typespec *ts, symbol_attribute *attr, gfc_expr *init)
       && ts->u.cl
       && ts->u.cl->length && ts->u.cl->length->expr_type == EXPR_CONSTANT)
     {
-      int len;
-
       gcc_assert (ts->u.cl && ts->u.cl->length);
       gcc_assert (ts->u.cl->length->expr_type == EXPR_CONSTANT);
       gcc_assert (ts->u.cl->length->ts.type == BT_INTEGER);
 
-      len = mpz_get_si (ts->u.cl->length->value.integer);
+      HOST_WIDE_INT len = gfc_mpz_get_hwi (ts->u.cl->length->value.integer);
 
       if (init->expr_type == EXPR_CONSTANT)
         gfc_set_constant_character_len (len, init, -1);
@@ -4276,7 +4272,6 @@ gfc_apply_init (gfc_typespec *ts, symbol_attribute *attr, gfc_expr *init)
 
           if (ctor)
             {
-              int first_len;
               bool has_ts = (init->ts.u.cl
                              && init->ts.u.cl->length_from_typespec);
 
@@ -4285,7 +4280,7 @@ gfc_apply_init (gfc_typespec *ts, symbol_attribute *attr, gfc_expr *init)
                  length.  This need not be the length of the LHS!  */
               gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
               gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
-              first_len = ctor->expr->value.character.length;
+              gfc_charlen_t first_len = ctor->expr->value.character.length;
 
               for ( ; ctor; ctor = gfc_constructor_next (ctor))
                 if (ctor->expr->expr_type == EXPR_CONSTANT)
diff --git a/gcc/fortran/match.h b/gcc/fortran/match.h
index 2e04b3e..6f12b13 100644
--- a/gcc/fortran/match.h
+++ b/gcc/fortran/match.h
@@ -230,7 +230,8 @@ match gfc_match_type (gfc_statement *);
 match gfc_match_implicit_none (void);
 match gfc_match_implicit (void);
 
-void gfc_set_constant_character_len (int, gfc_expr *, int);
+void gfc_set_constant_character_len (gfc_charlen_t, gfc_expr *,
+				     gfc_charlen_t);
 
 /* Matchers for attribute declarations.  */
 match gfc_match_allocatable (void);
diff --git a/gcc/fortran/primary.c b/gcc/fortran/primary.c
index 4b6ad47..3d07673 100644
--- a/gcc/fortran/primary.c
+++ b/gcc/fortran/primary.c
@@ -1006,7 +1006,8 @@ static match
 match_string_constant (gfc_expr **result)
 {
   char name[GFC_MAX_SYMBOL_LEN + 1], peek;
-  int i, kind, length, save_warn_ampersand, ret;
+  size_t length;
+  int kind,save_warn_ampersand, ret;
   locus old_locus, start_locus;
   gfc_symbol *sym;
   gfc_expr *e;
@@ -1125,7 +1126,7 @@ got_delim:
   warn_ampersand = false;
 
   p = e->value.character.string;
-  for (i = 0; i < length; i++)
+  for (size_t i = 0; i < length; i++)
     {
       c = next_string_char (delimiter, &ret);
 
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index 57155cd..d32fe96 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -10120,8 +10120,6 @@ resolve_ordinary_assign (gfc_code *code, gfc_namespace *ns)
   bool rval = false;
   gfc_expr *lhs;
   gfc_expr *rhs;
-  int llen = 0;
-  int rlen = 0;
   int n;
   gfc_ref *ref;
   symbol_attribute attr;
@@ -10203,10 +10201,11 @@ resolve_ordinary_assign (gfc_code *code, gfc_namespace *ns)
   if (lhs->ts.type == BT_CHARACTER
 	&& warn_character_truncation)
     {
+      HOST_WIDE_INT llen = 0, rlen = 0;
       if (lhs->ts.u.cl != NULL
 	    && lhs->ts.u.cl->length != NULL
 	    && lhs->ts.u.cl->length->expr_type == EXPR_CONSTANT)
-	llen = mpz_get_si (lhs->ts.u.cl->length->value.integer);
+	llen = gfc_mpz_get_hwi (lhs->ts.u.cl->length->value.integer);
 
       if (rhs->expr_type == EXPR_CONSTANT)
  	rlen = rhs->value.character.length;
@@ -10214,12 +10213,13 @@ resolve_ordinary_assign (gfc_code *code, gfc_namespace *ns)
       else if (rhs->ts.u.cl != NULL
 		 && rhs->ts.u.cl->length != NULL
 		 && rhs->ts.u.cl->length->expr_type == EXPR_CONSTANT)
-	rlen = mpz_get_si (rhs->ts.u.cl->length->value.integer);
+	rlen = gfc_mpz_get_hwi (rhs->ts.u.cl->length->value.integer);
 
       if (rlen && llen && rlen > llen)
 	gfc_warning_now (OPT_Wcharacter_truncation,
 			 "CHARACTER expression will be truncated "
-			 "in assignment (%d/%d) at %L",
+			 "in assignment (" HOST_WIDE_INT_PRINT_DEC "/"
+			 HOST_WIDE_INT_PRINT_DEC ") at %L",
 			 llen, rlen, &code->loc);
     }
 
diff --git a/gcc/fortran/simplify.c b/gcc/fortran/simplify.c
index 3e5abd4..1f6520c 100644
--- a/gcc/fortran/simplify.c
+++ b/gcc/fortran/simplify.c
@@ -275,7 +275,7 @@ init_result_expr (gfc_expr *e, int init, gfc_expr *array)
   else if (e && e->expr_type == EXPR_CONSTANT)
     {
       int i = gfc_validate_kind (e->ts.type, e->ts.kind, false);
-      int length;
+      HOST_WIDE_INT length;
       gfc_char_t *string;
 
       switch (e->ts.type)
@@ -313,14 +313,14 @@ init_result_expr (gfc_expr *e, int init, gfc_expr *array)
 	    if (init == INT_MIN)
 	      {
 		gfc_expr *len = gfc_simplify_len (array, NULL);
-		gfc_extract_int (len, &length);
+		gfc_extract_hwi (len, &length);
 		string = gfc_get_wide_string (length + 1);
 		gfc_wide_memset (string, 0, length);
 	      }
 	    else if (init == INT_MAX)
 	      {
 		gfc_expr *len = gfc_simplify_len (array, NULL);
-		gfc_extract_int (len, &length);
+		gfc_extract_hwi (len, &length);
 		string = gfc_get_wide_string (length + 1);
 		gfc_wide_memset (string, 255, length);
 	      }
@@ -4415,7 +4415,7 @@ gfc_expr *
 gfc_simplify_len_trim (gfc_expr *e, gfc_expr *kind)
 {
   gfc_expr *result;
-  int count, len, i;
+  size_t count, len, i;
   int k = get_kind (BT_INTEGER, kind, "LEN_TRIM", gfc_default_integer_kind);
 
   if (k == -1)
diff --git a/gcc/fortran/target-memory.c b/gcc/fortran/target-memory.c
index c708b17..e445fbe 100644
--- a/gcc/fortran/target-memory.c
+++ b/gcc/fortran/target-memory.c
@@ -216,8 +216,8 @@ encode_logical (int kind, int logical, unsigned char *buffer, size_t buffer_size
 }
 
 
-int
-gfc_encode_character (int kind, gfc_charlen_t length, const gfc_char_t *string,
+size_t
+gfc_encode_character (int kind, size_t length, const gfc_char_t *string,
 		      unsigned char *buffer, size_t buffer_size)
 {
   size_t elsize = size_character (1, kind);
@@ -225,7 +225,7 @@ gfc_encode_character (int kind, gfc_charlen_t length, const gfc_char_t *string,
 
   gcc_assert (buffer_size >= size_character (length, kind));
 
-  for (size_t i = 0; i < (size_t) length; i++)
+  for (size_t i = 0; i < length; i++)
     native_encode_expr (build_int_cst (type, string[i]), &buffer[i*elsize],
 			elsize);
 
@@ -318,11 +318,11 @@ gfc_target_encode_expr (gfc_expr *source, unsigned char *buffer,
 				     buffer, buffer_size);
       else
 	{
-	  int start, end;
+	  HOST_WIDE_INT start, end;
 
 	  gcc_assert (source->expr_type == EXPR_SUBSTRING);
-	  gfc_extract_int (source->ref->u.ss.start, &start);
-	  gfc_extract_int (source->ref->u.ss.end, &end);
+	  gfc_extract_hwi (source->ref->u.ss.start, &start);
+	  gfc_extract_hwi (source->ref->u.ss.end, &end);
 	  return gfc_encode_character (source->ts.kind, MAX(end - start + 1, 0),
 				       &source->value.character.string[start-1],
 				       buffer, buffer_size);
@@ -348,22 +348,21 @@ gfc_target_encode_expr (gfc_expr *source, unsigned char *buffer,
 }
 
 
-static int
+static size_t
 interpret_array (unsigned char *buffer, size_t buffer_size, gfc_expr *result)
 {
   gfc_constructor_base base = NULL;
-  int array_size = 1;
-  int i;
-  int ptr = 0;
+  size_t array_size = 1;
+  size_t ptr = 0;
 
   /* Calculate array size from its shape and rank.  */
   gcc_assert (result->rank > 0 && result->shape);
 
-  for (i = 0; i < result->rank; i++)
-    array_size *= (int)mpz_get_ui (result->shape[i]);
+  for (int i = 0; i < result->rank; i++)
+    array_size *= mpz_get_ui (result->shape[i]);
 
   /* Iterate over array elements, producing constructors.  */
-  for (i = 0; i < array_size; i++)
+  for (size_t i = 0; i < array_size; i++)
     {
       gfc_expr *e = gfc_get_constant_expr (result->ts.type, result->ts.kind,
 					   &result->where);
@@ -433,7 +432,7 @@ gfc_interpret_logical (int kind, unsigned char *buffer, size_t buffer_size,
 }
 
 
-int
+size_t
 gfc_interpret_character (unsigned char *buffer, size_t buffer_size,
 			 gfc_expr *result)
 {
@@ -452,7 +451,7 @@ gfc_interpret_character (unsigned char *buffer, size_t buffer_size,
   else
     {
       mpz_t integer;
-      unsigned bytes = size_character (1, result->ts.kind);
+      size_t bytes = size_character (1, result->ts.kind);
       mpz_init (integer);
       gcc_assert (bytes <= sizeof (unsigned long));
 
@@ -556,7 +555,7 @@ gfc_interpret_derived (unsigned char *buffer, size_t buffer_size, gfc_expr *resu
 
 
 /* Read a binary buffer to a constant expression.  */
-int
+size_t
 gfc_target_interpret_expr (unsigned char *buffer, size_t buffer_size,
 			   gfc_expr *result, bool convert_widechar)
 {
diff --git a/gcc/fortran/target-memory.h b/gcc/fortran/target-memory.h
index a9141a6..8f25899 100644
--- a/gcc/fortran/target-memory.h
+++ b/gcc/fortran/target-memory.h
@@ -28,7 +28,7 @@ size_t gfc_element_size (gfc_expr *);
 size_t gfc_target_expr_size (gfc_expr *);
 
 /* Write a constant expression in binary form to a target buffer.  */
-int gfc_encode_character (int, gfc_charlen_t, const gfc_char_t *, unsigned char *,
+size_t gfc_encode_character (int, size_t, const gfc_char_t *, unsigned char *,
 			  size_t);
 unsigned HOST_WIDE_INT gfc_target_encode_expr (gfc_expr *, unsigned char *,
 					       size_t);
@@ -39,9 +39,9 @@ int gfc_interpret_integer (int, unsigned char *, size_t, mpz_t);
 int gfc_interpret_float (int, unsigned char *, size_t, mpfr_t);
 int gfc_interpret_complex (int, unsigned char *, size_t, mpc_t);
 int gfc_interpret_logical (int, unsigned char *, size_t, int *);
-int gfc_interpret_character (unsigned char *, size_t, gfc_expr *);
+size_t gfc_interpret_character (unsigned char *, size_t, gfc_expr *);
 int gfc_interpret_derived (unsigned char *, size_t, gfc_expr *);
-int gfc_target_interpret_expr (unsigned char *, size_t, gfc_expr *, bool);
+size_t gfc_target_interpret_expr (unsigned char *, size_t, gfc_expr *, bool);
 
 /* Merge overlapping equivalence initializers for trans-common.c. */
 size_t gfc_merge_initializers (gfc_typespec, gfc_expr *, locus *,
diff --git a/gcc/fortran/trans-const.c b/gcc/fortran/trans-const.c
index 028e6d2..4b6adbf 100644
--- a/gcc/fortran/trans-const.c
+++ b/gcc/fortran/trans-const.c
@@ -69,7 +69,7 @@ gfc_build_const (tree type, tree intval)
 /* Build a string constant with C char type.  */
 
 tree
-gfc_build_string_const (int length, const char *s)
+gfc_build_string_const (size_t length, const char *s)
 {
   tree str;
   tree len;
@@ -89,7 +89,7 @@ gfc_build_string_const (int length, const char *s)
    non-default character kinds.  */
 
 tree
-gfc_build_wide_string_const (int kind, int length, const gfc_char_t *string)
+gfc_build_wide_string_const (int kind, size_t length, const gfc_char_t *string)
 {
   int i;
   tree str, len;
diff --git a/gcc/fortran/trans-const.h b/gcc/fortran/trans-const.h
index 39693bb..4f5a520 100644
--- a/gcc/fortran/trans-const.h
+++ b/gcc/fortran/trans-const.h
@@ -44,8 +44,8 @@ tree gfc_conv_constant_to_tree (gfc_expr *);
    structures.  Also sets the length of CHARACTER strings in the gfc_se.  */
 void gfc_conv_constant (gfc_se *, gfc_expr *);
 
-tree gfc_build_string_const (int, const char *);
-tree gfc_build_wide_string_const (int, int, const gfc_char_t *);
+tree gfc_build_string_const (size_t, const char *);
+tree gfc_build_wide_string_const (int, size_t, const gfc_char_t *);
 tree gfc_build_cstring_const (const char *);
 tree gfc_build_localized_cstring_const (const char *);
 
