--- a/target/linux/x86-2.6/image/Makefile
+++ b/target/linux/x86-2.6/image/Makefile
@@ -35,7 +35,7 @@
   endef
 
   define Image/cmdline/ext2
-    root=$(ROOTPART) rootfstype=ext2
+    root=$(ROOTPART) rootfstype=ext2 init=/etc/preinit
   endef
   
   define Image/Build/grub