diff --git a/Modules/Makefile.tpl b/Modules/Makefile.tpl
index dda0f6b98113eb120a6e98d4089d56e6a0b5c9f9..b404046ac963c874b1465c98e5d8132570584a42 100644
--- a/Modules/Makefile.tpl
+++ b/Modules/Makefile.tpl
@@ -7,7 +7,7 @@ _CPPFLAGS := $(CPPFLAGS)
 -include $(dir $(lastword $(MAKEFILE_LIST)))../Makefile.cfg
 
 CPPFLAGS := -I$(ACESSDIR)/Kernel/include -I$(ACESSDIR)/Kernel/arch/$(ARCHDIR)/include -DARCH=$(ARCH) $(_CPPFLAGS)
-CFLAGS := -Wall -Werror -fno-stack-protector -g -O3 -fno-builtin
+CFLAGS := -std=gnu99 -Wall -Werror -fno-stack-protector -g -O3 -fno-builtin
 
 ifneq ($(CATEGORY),)
 	FULLNAME := $(CATEGORY)_$(NAME)