diff --git a/Makefile b/Makefile
index 9d8c236..59418db 100755
--- a/Makefile
+++ b/Makefile
@@ -290,7 +290,7 @@ endif
 CC       := $(CLANGPATH)clang
 
 #CFLAGS   += -O0
-CFLAGS   += -O3 -Os -I/usr/include
+CFLAGS   += -O3 -Os -I/usr/include -Wno-format-invalid-specifier -Wno-format-extra-args -Wno-main
 
 AS     := $(GCCPATH)arm-none-eabi-gcc