diff --git a/arch/powerpc/boot/dts/p1010rdb.dtsi b/arch/powerpc/boot/dts/p1010rdb.dtsi
index 1c41ef0c817cb670f48804d2efd5549a6a406691..49776143a1b84874b515ecd164a384aface0f122 100644
--- a/arch/powerpc/boot/dts/p1010rdb.dtsi
+++ b/arch/powerpc/boot/dts/p1010rdb.dtsi
@@ -196,7 +196,7 @@
 		};
 
 		tbi-phy@3 {
-			device-type = "tbi-phy";
+			device_type = "tbi-phy";
 			reg = <0x3>;
 		};
 	};