diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f3b2b1dd0f9..6311e0bacc7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-08-16  Iain Sandoe <iain@sandoe.co.uk>
+
+	* gcc.dg/memcmp-1.c (lib_memcmp): Apply __USER_LABEL_PREFIX__.
+	(lib_strncmp): Likewise.
+
 2018-08-16  Iain Sandoe <iain@sandoe.co.uk>
 
 	* c-c++-common/asan/pointer-subtract-3.c: Skip for Darwin.
diff --git a/gcc/testsuite/gcc.dg/memcmp-1.c b/gcc/testsuite/gcc.dg/memcmp-1.c
index a79db512b66..619cf9b0d73 100644
--- a/gcc/testsuite/gcc.dg/memcmp-1.c
+++ b/gcc/testsuite/gcc.dg/memcmp-1.c
@@ -8,8 +8,13 @@
 #include <string.h>
 #include <stdint.h>
 
-int lib_memcmp(const void *a, const void *b, size_t n) asm("memcmp");
-int lib_strncmp(const char *a, const char *b, size_t n) asm("strncmp");
+#define STR1(X) #X
+#define STR2(X) STR1(X)
+
+int lib_memcmp(const void *a, const void *b, size_t n)
+ asm(STR2(__USER_LABEL_PREFIX__) "memcmp");
+int lib_strncmp(const char *a, const char *b, size_t n)
+ asm(STR2(__USER_LABEL_PREFIX__) "strncmp");
 
 #ifndef NRAND
 #ifdef TEST_ALL