diff --git a/sys/arch/i386/stand/boot/Makefile.boot b/sys/arch/i386/stand/boot/Makefile.boot
index b11702b56394..feab35f573bf 100644
--- a/sys/arch/i386/stand/boot/Makefile.boot
+++ b/sys/arch/i386/stand/boot/Makefile.boot
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.boot,v 1.54 2011/07/01 01:26:16 mrg Exp $
+# $NetBSD: Makefile.boot,v 1.55 2011/08/22 09:43:08 mrg Exp $
 
 S=	${.CURDIR}/../../../../..
 
@@ -51,6 +51,8 @@ CPUFLAGS=  -march=i386 -mtune=i386
 .endif
 .endif
 
+CFLAGS+=   -mno-sse -mno-sse2 -mno-sse3
+
 COPTS+=    -ffreestanding
 CFLAGS+= -Wall -Wmissing-prototypes -Wstrict-prototypes
 CPPFLAGS+= -nostdinc -D_STANDALONE