diff --git a/source/Google/MobileAds/ApiDefinition.cs b/source/Google/MobileAds/ApiDefinition.cs
index d00b492de..7d2d2a200 100644
--- a/source/Google/MobileAds/ApiDefinition.cs
+++ b/source/Google/MobileAds/ApiDefinition.cs
@@ -905,6 +905,10 @@ interface NativeAd {
 		[Export ("advertiser")]
 		string Advertiser { get; }
 
+		[NullAllowed]
+		[Export("headline")]
+		string Headline { get; }
+
 		// @property(nonatomic, readonly, nonnull) GADMediaContent *mediaContent;
 		[Export ("mediaContent")]
 		MediaContent MediaContent { get; }
@@ -987,22 +991,47 @@ interface NativeAd {
 		void RecordCustomClickGesture ();
 	}
 
-	interface IUnifiedNativeAdLoaderDelegate { }
+ 
+    interface ICustomNativeAdLoaderDelegate
+    {
+    }
+
+#if NET
+    [Model]
+#else
+    [Model (AutoGeneratedName = true)]
+#endif
+    [Protocol]
+    [BaseType(typeof(NSObject), Name = "GADCustomNativeAdLoaderDelegate")]
+    interface CustomNativeAdLoaderDelegate : IAdLoaderDelegate
+    {
+        // @required -(NSArray *)nativeCustomTemplateIDsForAdLoader:(GADAdLoader *)adLoader;
+        [Abstract]
+        [Export("customNativeAdFormatIDsForAdLoader:")]
+        string[] CustomNativeAdFormatIDsForAdLoader(AdLoader adLoader);
+
+        // @required -(void)adLoader:(GADAdLoader *)adLoader didReceiveNativeCustomTemplateAd:(GADNativeCustomTemplateAd *)nativeCustomTemplateAd;
+        [Abstract]
+        [Export("adLoader:didReceiveCustomNativeAd:")]
+        void DidReceiveNativeCustomTemplateAd(AdLoader adLoader, CustomNativeAd nativeCustomTemplateAd);
+    }
+
+	interface INativeAdLoaderDelegate { }
 
 	// CHECK
-	// @protocol GADUnifiedNativeAdLoaderDelegate <GADAdLoaderDelegate>
+	// @protocol GADNativeAdLoaderDelegate <GADAdLoaderDelegate>
 #if NET
     [Model]
 #else
     [Model (AutoGeneratedName = true)]
 #endif
 	[Protocol]
-	[BaseType (typeof (NSObject), Name = "GADUnifiedNativeAdLoaderDelegate")]
-	interface UnifiedNativeAdLoaderDelegate : AdLoaderDelegate {
-		// @required -(void)adLoader:(GADAdLoader * _Nonnull)adLoader didReceiveUnifiedNativeAd:(GADNativeAd * _Nonnull)nativeAd;
+	[BaseType (typeof (NSObject), Name = "GADNativeAdLoaderDelegate")]
+	interface NativeAdLoaderDelegate : AdLoaderDelegate {
+		// @required -(void)adLoader:(GADAdLoader * _Nonnull)adLoader didReceiveNativeAd:(GADNativeAd * _Nonnull)nativeAd;
 		[Abstract]
-		[Export ("adLoader:didReceiveUnifiedNativeAd:")]
-		void DidReceiveUnifiedNativeAd (AdLoader adLoader, NativeAd nativeAd);
+		[Export ("adLoader:didReceiveNativeAd:")]
+		void DidReceiveNativeAd (AdLoader adLoader, NativeAd nativeAd);
 	}
 
 	// @interface GADNativeAdView : UIView