diff --git a/make-mac.mk b/make-mac.mk
index e53212c0e..174216fb1 100644
--- a/make-mac.mk
+++ b/make-mac.mk
@@ -6,7 +6,7 @@ ifeq ($(origin CXX),default)
 endif
 
 INCLUDES=
-DEFS=-DZT_ENABLE_CLUSTER
+DEFS=
 LIBS=
 ARCH_FLAGS=-arch x86_64