diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index bc21b06825..4390af56b3 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -60,5 +60,6 @@ sysdep_routines += bzero memset memset-z900 \
 		   memmove memmove-c \
 		   strstr strstr-vx strstr-c \
 		   memmem memmem-vx memmem-c \
-		   strlen strlen-vx strlen-c
+		   strlen strlen-vx strlen-c \
+		   strnlen strnlen-vx strnlen-c
 endif
diff --git a/sysdeps/s390/ifunc-strnlen.h b/sysdeps/s390/ifunc-strnlen.h
new file mode 100644
index 0000000000..e923298887
--- /dev/null
+++ b/sysdeps/s390/ifunc-strnlen.h
@@ -0,0 +1,52 @@
+/* strnlen variant information on S/390 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#if defined USE_MULTIARCH && IS_IN (libc)		\
+  && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define HAVE_STRNLEN_IFUNC	1
+#else
+# define HAVE_STRNLEN_IFUNC	0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_STRNLEN_IFUNC_AND_VX_SUPPORT HAVE_STRNLEN_IFUNC
+#else
+# define HAVE_STRNLEN_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define STRNLEN_DEFAULT	STRNLEN_Z13
+# define HAVE_STRNLEN_C		0
+# define HAVE_STRNLEN_Z13	1
+#else
+# define STRNLEN_DEFAULT	STRNLEN_C
+# define HAVE_STRNLEN_C		1
+# define HAVE_STRNLEN_Z13	HAVE_STRNLEN_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_STRNLEN_C
+# define STRNLEN_C		__strnlen_c
+#else
+# define STRNLEN_C		NULL
+#endif
+
+#if HAVE_STRNLEN_Z13
+# define STRNLEN_Z13		__strnlen_vx
+#else
+# define STRNLEN_Z13		NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 601523919c..35ba223c5d 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
 ifeq ($(subdir),string)
-sysdep_routines += strnlen strnlen-vx strnlen-c \
-		   strcpy strcpy-vx \
+sysdep_routines += strcpy strcpy-vx \
 		   stpcpy stpcpy-vx stpcpy-c \
 		   strncpy strncpy-vx \
 		   stpncpy stpncpy-vx stpncpy-c \
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index c531be4bc7..680e5b738b 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -27,6 +27,7 @@
 #include <ifunc-strstr.h>
 #include <ifunc-memmem.h>
 #include <ifunc-strlen.h>
+#include <ifunc-strnlen.h>
 
 /* Maximum number of IFUNC implementations.  */
 #define MAX_IFUNC	3
@@ -177,6 +178,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 		)
 #endif /* HAVE_STRLEN_IFUNC  */
 
+#if HAVE_STRNLEN_IFUNC
+    IFUNC_IMPL (i, name, strnlen,
+# if HAVE_STRNLEN_Z13
+		IFUNC_IMPL_ADD (array, i, strnlen,
+				dl_hwcap & HWCAP_S390_VX, STRNLEN_Z13)
+# endif
+# if HAVE_STRNLEN_C
+		IFUNC_IMPL_ADD (array, i, strnlen, 1, STRNLEN_C)
+# endif
+		)
+#endif /* HAVE_STRNLEN_IFUNC  */
+
 #ifdef HAVE_S390_VX_ASM_SUPPORT
 
 # define IFUNC_VX_IMPL(FUNC)						\
@@ -187,7 +200,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 
   IFUNC_VX_IMPL (wcslen);
 
-  IFUNC_VX_IMPL (strnlen);
   IFUNC_VX_IMPL (wcsnlen);
 
   IFUNC_VX_IMPL (strcpy);
diff --git a/sysdeps/s390/multiarch/strnlen-c.c b/sysdeps/s390/strnlen-c.c
similarity index 81%
rename from sysdeps/s390/multiarch/strnlen-c.c
rename to sysdeps/s390/strnlen-c.c
index 353e83ed35..c2d887f1e4 100644
--- a/sysdeps/s390/multiarch/strnlen-c.c
+++ b/sysdeps/s390/strnlen-c.c
@@ -16,15 +16,19 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
-# define STRNLEN  __strnlen_c
-# ifdef SHARED
-#  undef libc_hidden_def
-#  define libc_hidden_def(name)					\
+#include <ifunc-strnlen.h>
+
+#if HAVE_STRNLEN_C
+# if HAVE_STRNLEN_IFUNC
+#  define STRNLEN STRNLEN_C
+#  if defined SHARED && IS_IN (libc)
+#   undef libc_hidden_def
+#   define libc_hidden_def(name)					\
   __hidden_ver1 (__strnlen_c, __GI_strnlen, __strnlen_c);	\
   strong_alias (__strnlen_c, __strnlen_c_1);			\
   __hidden_ver1 (__strnlen_c_1, __GI___strnlen, __strnlen_c_1);
-# endif /* SHARED */
+#  endif
+# endif
 
 # include <string/strnlen.c>
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+#endif
diff --git a/sysdeps/s390/multiarch/strnlen-vx.S b/sysdeps/s390/strnlen-vx.S
similarity index 90%
rename from sysdeps/s390/multiarch/strnlen-vx.S
rename to sysdeps/s390/strnlen-vx.S
index fc659a956c..0b8fe3da34 100644
--- a/sysdeps/s390/multiarch/strnlen-vx.S
+++ b/sysdeps/s390/strnlen-vx.S
@@ -16,7 +16,9 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+#include <ifunc-strnlen.h>
+
+#if HAVE_STRNLEN_Z13
 
 # include "sysdep.h"
 # include "asm-syntax.h"
@@ -34,7 +36,7 @@
    -r5=current_len and return_value
    -v16=part of s
 */
-ENTRY(__strnlen_vx)
+ENTRY(STRNLEN_Z13)
 	.machine "z13"
 	.machinemode "zarch_nohighgprs"
 
@@ -130,5 +132,16 @@ ENTRY(__strnlen_vx)
 	clgrjl	%r1,%r3,.Lloop64
 
 	j	.Llt64
-END(__strnlen_vx)
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+END(STRNLEN_Z13)
+
+# if ! HAVE_STRNLEN_IFUNC
+strong_alias (STRNLEN_Z13, __strnlen)
+weak_alias (__strnlen, strnlen)
+# endif
+
+# if ! HAVE_STRNLEN_C && defined SHARED && IS_IN (libc)
+strong_alias (STRNLEN_Z13, __GI_strnlen)
+strong_alias (STRNLEN_Z13, __GI___strnlen)
+# endif
+
+#endif /* HAVE_STRNLEN_Z13  */
diff --git a/sysdeps/s390/multiarch/strnlen.c b/sysdeps/s390/strnlen.c
similarity index 69%
rename from sysdeps/s390/multiarch/strnlen.c
rename to sysdeps/s390/strnlen.c
index 0f9cff5d69..aa4953d503 100644
--- a/sysdeps/s390/multiarch/strnlen.c
+++ b/sysdeps/s390/strnlen.c
@@ -16,7 +16,9 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+#include <ifunc-strnlen.h>
+
+#if HAVE_STRNLEN_IFUNC
 # define strnlen __redirect_strnlen
 # define __strnlen __redirect___strnlen
 # include <string.h>
@@ -24,9 +26,18 @@
 # undef __strnlen
 # include <ifunc-resolve.h>
 
-s390_vx_libc_ifunc_redirected (__redirect___strnlen, __strnlen)
-weak_alias (__strnlen, strnlen)
+# if HAVE_STRNLEN_C
+extern __typeof (__redirect_strnlen) STRNLEN_C attribute_hidden;
+# endif
 
-#else
-# include <string/strnlen.c>
-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
+# if HAVE_STRNLEN_Z13
+extern __typeof (__redirect_strnlen) STRNLEN_Z13 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__redirect___strnlen, __strnlen,
+		      (HAVE_STRNLEN_Z13 && (hwcap & HWCAP_S390_VX))
+		      ? STRNLEN_Z13
+		      : STRNLEN_DEFAULT
+		      )
+weak_alias (__strnlen, strnlen)
+#endif /* HAVE_STRNLEN_IFUNC  */
