diff --git a/Makefile b/Makefile
index 3ed3f2730a4a..7c776f295d24 100644
--- a/Makefile
+++ b/Makefile
@@ -624,7 +624,7 @@ KBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, int-in-bool-context)
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS	+= -Os
+KBUILD_CFLAGS	+= $(call cc-option,-Oz,-Os)
 else
 ifdef CONFIG_PROFILE_ALL_BRANCHES
 KBUILD_CFLAGS	+= -O2