diff --git a/json-parser.c b/json-parser.c
index 6c06ef9..3747ba5 100644
--- a/json-parser.c
+++ b/json-parser.c
@@ -512,6 +512,8 @@ static QObject *parse_literal(JSONParserContext *ctxt, QList **tokens)
 {
     QObject *token, *obj;
     QList *working = qlist_copy(*tokens);
+    const char *token_str;
+    unsigned long long ull;
 
     token = qlist_pop(working);
     switch (token_get_type(token)) {
@@ -519,7 +521,14 @@ static QObject *parse_literal(JSONParserContext *ctxt, QList **tokens)
         obj = QOBJECT(qstring_from_escaped_str(ctxt, token));
         break;
     case JSON_INTEGER:
-        obj = QOBJECT(qint_from_int(strtoll(token_get_value(token), NULL, 10)));
+        token_str = token_get_value(token);
+        errno = 0;
+        ull = strtoull(token_str, NULL, 10);
+        if (errno != 0) {
+            parse_error(ctxt, token, "invalid integer: %s", strerror(errno));
+            return NULL;
+        }
+        obj = QOBJECT(qint_from_int(ull));
         break;
     case JSON_FLOAT:
         /* FIXME dependent on locale */