diff --git a/target/linux/rdc/Makefile b/target/linux/rdc/Makefile
index 55600f910e..1e2083e9ae 100644
--- a/target/linux/rdc/Makefile
+++ b/target/linux/rdc/Makefile
@@ -10,6 +10,7 @@ ARCH:=i386
 BOARD:=rdc
 BOARDNAME:=RDC 321x
 FEATURES:=squashfs jffs2 pci usb
+CFLAGS:=-Os -pipe -march=i486 -funit-at-a-time
 
 LINUX_VERSION:=2.6.24.7