diff --git a/tools/firmware/Rules.mk b/tools/firmware/Rules.mk
index 26bbddccd4..87a8c752bd 100644
--- a/tools/firmware/Rules.mk
+++ b/tools/firmware/Rules.mk
@@ -15,5 +15,7 @@ CFLAGS += -Werror
 
 $(call cc-options-add,CFLAGS,CC,$(EMBEDDED_EXTRA_CFLAGS))
 
+$(call cc-option-add,CFLAGS,CC,-fcf-protection=none)
+
 # Extra CFLAGS suitable for an embedded type of environment.
 CFLAGS += -fno-builtin -msoft-float