diff --git a/openwrt/toolchain/Config.in b/openwrt/toolchain/Config.in
index b5258ddce9..32dc33e277 100644
--- a/openwrt/toolchain/Config.in
+++ b/openwrt/toolchain/Config.in
@@ -54,6 +54,7 @@ config TARGET_OPTIMIZATION
 	default "-Os -pipe -march=i486 -funit-at-a-time" if i386
 	default "-Os -pipe -mips32 -mtune=mips32 -funit-at-a-time" if mipsel || mips
 	default "-Os -pipe -mcpu=xscale -funit-at-a-time" if armeb
+	default "-Os -pipe -funit-at-a-time -mcpu=405" if LINUX_2_6_MAGICBOX
 	default "-Os -pipe -funit-at-a-time"
 	help
 	  Optimizations to use when building for the target host.