diff --git a/tests/Makefile.am b/tests/Makefile.am
index fb3384fa56936b3c7c1fe1b415a2201e419ba566..23497b74eae29043335eb32b9b46e847792c4a24 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -51,6 +51,8 @@ testReading_SOURCES = testReading.c
 
 testSymmetry_SOURCES = testSymmetry.c
 
+testSymmetry_CFLAGS = $(AM_CFLAGS) -fno-builtin-memcmp
+
 testTimeIntegration_SOURCES = testTimeIntegration.c
 
 testSPHStep_SOURCES = testSPHStep.c