diff --git a/target/linux/ramips/dts/mt7621.dtsi b/target/linux/ramips/dts/mt7621.dtsi
index 0f7ca13da7..b658532958 100644
--- a/target/linux/ramips/dts/mt7621.dtsi
+++ b/target/linux/ramips/dts/mt7621.dtsi
@@ -33,13 +33,19 @@
 		compatible = "mti,cpu-interrupt-controller";
 	};
 
-	ramoops@3f00000 {
-		compatible = "ramoops";
-		reg = <0x3f00000 0x100000>;
+	reserved-memory {
+		#address-cells = <0x1>;
+		#size-cells = <0x1>;
+		ranges;
 
-		record-size = <0x20000>;
-		console-size = <0x20000>;
-		ftrace-size = <0x40000>;
+		ramoops@3f00000 {
+			compatible = "ramoops";
+			reg = <0x3f00000 0x80000>;
+
+			record-size = <0x10000>;
+			console-size = <0x10000>;
+			ftrace-size = <0x20000>;
+		};
 	};
 
 	aliases {