diff --git a/src/@ionic-native/plugins/device-orientation/index.ts b/src/@ionic-native/plugins/device-orientation/index.ts
index bbddc0339..ffd4e52aa 100644
--- a/src/@ionic-native/plugins/device-orientation/index.ts
+++ b/src/@ionic-native/plugins/device-orientation/index.ts
@@ -22,7 +22,7 @@ export interface DeviceOrientationCompassHeading {
   /**
    * The time at which this heading was determined. (DOMTimeStamp)
    */
-  timestamp: any;
+  timestamp: number;
 
 }