--- 1/Makefile
+++ 2/Makefile
@@ -10,7 +10,7 @@
 FDISK=/dev/fd0
 
 CFLAGS= -Wall -march=i486 -m32 -O0 -fomit-frame-pointer -fno-builtin \
-	-ffreestanding -fPIC $(SMP_FL) -fno-stack-protector 
+	-ffreestanding -fPIC $(SMP_FL) -fno-stack-protector -std=gnu90
 CPPFLAGS= -m32
 ASFLAGS= -32