diff --git a/Makefile b/Makefile
index 2ac31178f5d55dc8e9d7402faf487e5af914f47f..2643454925aaaa7184e6921462ff2d96c5a9e197 100644
--- a/Makefile
+++ b/Makefile
@@ -493,6 +493,7 @@ endif
 CLANG_FLAGS	+= -no-integrated-as
 KBUILD_CFLAGS	+= $(CLANG_FLAGS)
 KBUILD_AFLAGS	+= $(CLANG_FLAGS)
+export CLANG_FLAGS
 endif
 
 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register