diff --git a/GoogleAdMobAds/binding/ApiDefinition.cs b/GoogleAdMobAds/binding/ApiDefinition.cs
index bfaae147..03a7dcd6 100644
--- a/GoogleAdMobAds/binding/ApiDefinition.cs
+++ b/GoogleAdMobAds/binding/ApiDefinition.cs
@@ -57,6 +57,7 @@ interface GADAdMobExtras : GADAdNetworkExtras
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADAdNetworkExtras
 	{
 		
@@ -100,6 +101,7 @@ interface GADBannerView
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADBannerViewDelegate
 	{
 		[Export ("adViewDidReceiveAd:"), EventArgs("GADBannerViewE")]
@@ -153,6 +155,7 @@ interface GADInterstitial
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADInterstitialDelegate 
 	{
 		[Export ("interstitialDidReceiveAd:"), EventArgs("GADInterstitialE")]
@@ -380,6 +383,7 @@ interface DFPSwipeableBannerView
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADAdSizeDelegate 
 	{
 		[Export ("adView:willChangeAdSizeTo:"), EventArgs("GADAdSizeDelegateSize")]
@@ -388,6 +392,7 @@ interface GADAdSizeDelegate
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADAppEventDelegate 
 	{
 		[Export ("adView:didReceiveAppEvent:withInfo:"), EventArgs("GADAppEventDelegateNameInfo")]
@@ -399,6 +404,7 @@ interface GADAppEventDelegate
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADSwipeableBannerViewDelegate 
 	{
 		[Export ("adViewDidActivateAd:"), EventArgs("GADSwipeableBannerViewDelegateInfo")]
@@ -429,6 +435,7 @@ interface GADCustomEventBanner
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADCustomEventBannerDelegate 
 	{
 		[Export ("customEventBanner:didReceiveAd:"), EventArgs("GADCustomEventBannerView")]
@@ -492,6 +499,7 @@ interface GADCustomEventInterstitial
 	
 	[BaseType (typeof (NSObject))]
 	[Model]
+	[Protocol]
 	interface GADCustomEventInterstitialDelegate 
 	{
 		[Export ("customEventInterstitial:didReceiveAd:"), EventArgs("GADCustomEventInterstitialAd")]
diff --git a/GoogleAdMobAds/binding/Makefile b/GoogleAdMobAds/binding/Makefile
index 41f10a21..b22392e2 100644
--- a/GoogleAdMobAds/binding/Makefile
+++ b/GoogleAdMobAds/binding/Makefile
@@ -1,7 +1,7 @@
 BTOUCH=/Developer/MonoTouch/usr/bin/btouch
 SMCS=/Developer/MonoTouch/usr/bin/smcs
 MONOXBUILD=/Library/Frameworks/Mono.framework/Commands/xbuild
-VERSION=6.4.1
+VERSION=6.4.2
 
 all: GoogleAdMobAds.dll