diff --git a/Makefile.x86_64 b/Makefile.x86_64
index 9e75dc91c..8a3fc4eae 100644
--- a/Makefile.x86_64
+++ b/Makefile.x86_64
@@ -64,7 +64,7 @@ endif
 endif
 endif
 
-ifeq ($(CORE), $(filter $(CORE), HASWELL ZEN SKYLAKEX COOPERLAKE)
+ifeq ($(CORE), $(filter $(CORE), HASWELL ZEN SKYLAKEX COOPERLAKE))
 ifndef DYNAMIC_ARCH
 ifndef NO_AVX2
 ifeq ($(C_COMPILER), GCC)