diff --git a/tests/Makefile.am b/tests/Makefile.am
index e50e58a4..8e278ab0 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -178,6 +178,7 @@ gem_fence_thrash_LDADD = $(LDADD) -lpthread
 gem_threaded_access_tiled_LDADD = $(LDADD) -lpthread
 
 gem_wait_render_timeout_LDADD = $(LDADD) -lrt
+flip_test_LDADD = $(LDADD) -lrt
 
 gem_ctx_basic_LDADD = $(LDADD) -lpthread