diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 2c25b1ab28a..ab1b829ba00 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -1093,6 +1093,8 @@ define Device/etisalat_s3
   SERCOMM_SWVER := 4009
   DEVICE_VENDOR := Etisalat
   DEVICE_MODEL := S3
+  DEVICE_ALT0_VENDOR := Sercomm
+  DEVICE_ALT0_MODEL := S3
   DEVICE_PACKAGES := kmod-mt7603 kmod-mt7615-firmware kmod-usb3
 endef
 TARGET_DEVICES += etisalat_s3