diff --git a/arch/arm/boot/dts/renesas/r7s72100-genmai.dts b/arch/arm/boot/dts/renesas/r7s72100-genmai.dts
index 29ba098f5dd5..28e703e0f152 100644
--- a/arch/arm/boot/dts/renesas/r7s72100-genmai.dts
+++ b/arch/arm/boot/dts/renesas/r7s72100-genmai.dts
@@ -53,7 +53,7 @@ partition@0 {
 
 			partition@4000000 {
 				label = "user1";
-				reg = <0x04000000 0x40000000>;
+				reg = <0x04000000 0x04000000>;
 			};
 		};
 	};