diff --git a/Makefile b/Makefile
index 610d1c3..1065154 100644
--- a/Makefile
+++ b/Makefile
@@ -533,7 +533,7 @@
 
 include $(srctree)/arch/$(SRCARCH)/Makefile
 
-ifneq (CONFIG_FRAME_WARN,0)
+ifneq ($(CONFIG_FRAME_WARN),0)
 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 endif