diff --git a/PushSharp.Apple/ApnsFeedbackService.cs b/PushSharp.Apple/ApnsFeedbackService.cs
index 57fb887a..69f87037 100644
--- a/PushSharp.Apple/ApnsFeedbackService.cs
+++ b/PushSharp.Apple/ApnsFeedbackService.cs
@@ -20,10 +20,10 @@ public FeedbackService (ApnsConfiguration configuration)
 
         public ApnsConfiguration Configuration { get; private set; }
 
-        public delegate void FeedbackReceivedDelegate (string deviceToken, DateTime timestamp);
+        public delegate void FeedbackReceivedDelegate (string deviceToken, DateTime timestamp, object optionalData);
         public event FeedbackReceivedDelegate FeedbackReceived;
 
-        public void Check ()
+        public void Check (object optionalData = null)
         {
             var encoding = Encoding.ASCII;
 
@@ -94,7 +94,7 @@ public void Check ()
                         // Raise the event to the consumer
                         var evt = FeedbackReceived;
                         if (evt != null)
-                            evt (token, timestamp);
+                            evt (token, timestamp, optionalData);
                     } else {
                         continue;
                     }