diff --git a/target/linux/lantiq/dts/ARV7506PW11.dts b/target/linux/lantiq/dts/ARV7506PW11.dts
index 352972b19c..676c0b898b 100644
--- a/target/linux/lantiq/dts/ARV7506PW11.dts
+++ b/target/linux/lantiq/dts/ARV7506PW11.dts
@@ -83,6 +83,7 @@
 
 		pci@E105400 {
 			status = "okay";
+			lantiq,external-clock;
 			gpio-reset = <&gpio 21 GPIO_ACTIVE_HIGH>;
 		};
 	};