diff --git a/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi b/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi
index 5f06339d13..c4441ec30e 100644
--- a/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi
+++ b/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi
@@ -92,7 +92,8 @@
 			partition@b260000 {
 				label = "firmware";
 				reg = <0x260000 0x6d0000>;
-				compatible = "denx,uimage";
+				compatible = "openwrt,uimage", "denx,uimage";
+				openwrt,ih-magic = <0x83800000>;
 			};
 			partition@930000 {
 				label = "runtime2";
diff --git a/target/linux/realtek/image/Makefile b/target/linux/realtek/image/Makefile
index 87c616c3f2..c05c504ec4 100644
--- a/target/linux/realtek/image/Makefile
+++ b/target/linux/realtek/image/Makefile
@@ -69,6 +69,7 @@ define Device/zyxel_gs1900-10hp
   IMAGE_SIZE := 6976k
   DEVICE_VENDOR := ZyXEL
   DEVICE_MODEL := GS1900-10HP
+  UIMAGE_MAGIC := 0x83800000
 endef
 TARGET_DEVICES += zyxel_gs1900-10hp
 
@@ -79,6 +80,7 @@ define Device/zyxel_gs1900-8hp-v1
   DEVICE_MODEL := GS1900-8HP
   DEVICE_VARIANT := v1
   DEVICE_PACKAGES += lua-rs232
+  UIMAGE_MAGIC := 0x83800000
 endef
 TARGET_DEVICES += zyxel_gs1900-8hp-v1
 
@@ -89,6 +91,7 @@ define Device/zyxel_gs1900-8hp-v2
   DEVICE_MODEL := GS1900-8HP
   DEVICE_VARIANT := v2
   DEVICE_PACKAGES += lua-rs232
+  UIMAGE_MAGIC := 0x83800000
 endef
 TARGET_DEVICES += zyxel_gs1900-8hp-v2