diff --git a/src/@ionic-native/plugins/admob/index.ts b/src/@ionic-native/plugins/admob/index.ts
index 82e4e313a..57d3bd2e2 100644
--- a/src/@ionic-native/plugins/admob/index.ts
+++ b/src/@ionic-native/plugins/admob/index.ts
@@ -112,7 +112,7 @@ export interface AdExtras {
  *   } else if (this.platform.is('ios')) {
  *     adId = 'YOUR_ADID_IOS';
  *   }
- *   this.admob.prepareInterstitial(adId)
+ *   this.admob.prepareInterstitial({adId: adId})
  *     .then(() => { this.admob.showInterstitial(); });
  * }
  *