1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 2449fe40..b36e2a3c 100644
--- a/Makefile
+++ b/Makefile
@@ -42,6 +42,7 @@ ifeq ($(ARCH),x86_64)
 	CFLAGS	+= -mno-mmx -mno-sse -mno-red-zone -nostdinc \
 		-maccumulate-outgoing-args \
 		-DEFI_FUNCTION_WRAPPER -DGNU_EFI_USE_MS_ABI \
+		-DNO_BUILTIN_VA_FUNCS \
 		"-DEFI_ARCH=L\"x64\"" \
 		"-DDEBUGDIR=L\"/usr/lib/debug/usr/share/shim/x64-$(VERSION)$(RELEASE)/\""
 endif