diff --git a/package/boot/uboot-envtools/files/ramips b/package/boot/uboot-envtools/files/ramips
index 790b4b4df09..f512015c23a 100644
--- a/package/boot/uboot-envtools/files/ramips
+++ b/package/boot/uboot-envtools/files/ramips
@@ -47,6 +47,7 @@ ravpower,rp-wd03)
 	[ -n "$idx" ] && \
 		ubootenv_add_uci_config "/dev/mtd$idx" "0x4000" "0x1000" "0x1000"
 	;;
+asus,rt-ax53u|\
 jcg,q20|\
 netgear,wax202)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x20000" "0x20000"