diff --git a/target/linux/ath79/dts/qca9558_tplink_rex5x.dtsi b/target/linux/ath79/dts/qca9558_tplink_rex5x.dtsi
index 3857635672..8000459f24 100644
--- a/target/linux/ath79/dts/qca9558_tplink_rex5x.dtsi
+++ b/target/linux/ath79/dts/qca9558_tplink_rex5x.dtsi
@@ -162,7 +162,7 @@
 
 			partition@630000 {
 				label = "config";
-				reg = <0x630000 0x1c0000>;
+				reg = <0x630000 0x020000>;
 				read-only;
 			};