diff --git a/target/linux/ramips/image/Makefile b/target/linux/ramips/image/Makefile
index b537a17d46..2c0fc462f0 100644
--- a/target/linux/ramips/image/Makefile
+++ b/target/linux/ramips/image/Makefile
@@ -1078,7 +1078,7 @@ define Device/ubnt-erx
 				 ubnt-erx-factory-kernel | \
 				 ubnt-erx-factory-rootfs | \
 				 ubnt-erx-factory-version | \
-				 ubnt-erx-factory-check-size $$$$(KERNEL_SIZE)
+				 ubnt-erx-factory-check-size $$(KERNEL_SIZE)
   IMAGE/sysupgrade.tar := sysupgrade-nand
 endef