diff --git a/target/linux/ppc40x/Makefile b/target/linux/ppc40x/Makefile
index f4423391a5..cf9dd2d52f 100644
--- a/target/linux/ppc40x/Makefile
+++ b/target/linux/ppc40x/Makefile
@@ -10,7 +10,7 @@ ARCH:=powerpc
 BOARD:=ppc40x
 BOARDNAME:=AMCC/IBM PPC40x
 FEATURES:=squashfs usb
-CFLAGS:=-Os -pipe -funit-at-a-time -mcpu=440
+CFLAGS:=-Os -pipe -funit-at-a-time -mcpu=405
 
 LINUX_VERSION:=2.6.30.3
 LINUX_KARCH:=powerpc