diff --git a/Makefile b/Makefile
index 0fffa99742ca..c9e27ba9152d 100644
--- a/Makefile
+++ b/Makefile
@@ -628,7 +628,7 @@ KBUILD_CFLAGS	+= $(call cc-disable-warning, int-in-bool-context)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, attribute-alias)
 
 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