diff --git a/target/linux/qoriq/files/arch/powerpc/boot/dts/fsl/watchguard-firebox-m300.dts b/target/linux/qoriq/files/arch/powerpc/boot/dts/fsl/watchguard-firebox-m300.dts
index 6628e0eb23..1e24a25ccd 100644
--- a/target/linux/qoriq/files/arch/powerpc/boot/dts/fsl/watchguard-firebox-m300.dts
+++ b/target/linux/qoriq/files/arch/powerpc/boot/dts/fsl/watchguard-firebox-m300.dts
@@ -362,6 +362,7 @@
 			reg = <0x32>;
 		};
 		pca9547@77 {
+			reg = <0x77>;
 			status = "disabled";
 		};
 	};