diff --git a/Makefile b/Makefile
index aefdb5661382121f01e5d44a15693e4cdc4a449f..1f35aca4fe055d2de5d88b4c740cbe18bc1fec25 100644
--- a/Makefile
+++ b/Makefile
@@ -528,6 +528,7 @@ ifneq ($(GCC_TOOLCHAIN),)
 CLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
 endif
 CLANG_FLAGS	+= -no-integrated-as
+CLANG_FLAGS	+= -Werror=unknown-warning-option
 KBUILD_CFLAGS	+= $(CLANG_FLAGS)
 KBUILD_AFLAGS	+= $(CLANG_FLAGS)
 export CLANG_FLAGS