diff --git a/arch/arm/dts/armada-xp-synology-ds414.dts b/arch/arm/dts/armada-xp-synology-ds414.dts
index 861967c..35909e3 100644
--- a/arch/arm/dts/armada-xp-synology-ds414.dts
+++ b/arch/arm/dts/armada-xp-synology-ds414.dts
@@ -187,6 +187,7 @@
 	pcie@1,0 {
 		/* Port 0, Lane 0 */
 		status = "okay";
+		num-lanes = <4>;
 	};
 
 	/*