diff --git a/target/linux/mpc85xx/image/Makefile b/target/linux/mpc85xx/image/Makefile
index d2c3ae1861..68c0da84ee 100644
--- a/target/linux/mpc85xx/image/Makefile
+++ b/target/linux/mpc85xx/image/Makefile
@@ -51,6 +51,7 @@ define Device/tl-wdr4900-v1
   TPLINK_HWID := 0x49000001
   TPLINK_HWREV := 1
   TPLINK_FLASHLAYOUT := 16Mppc
+  KERNEL_SIZE := 2684k
   KERNEL_NAME := cuImage.tl-wdr4900-v1
   KERNEL_INITRAMFS :=
   SUPPORTED_DEVICES:=tl-wdr4900-v1 tplink,tl-wdr4900-v1