diff --git a/PushSharp.Google/GcmNotification.cs b/PushSharp.Google/GcmNotification.cs
index b620e069..28ba0599 100644
--- a/PushSharp.Google/GcmNotification.cs
+++ b/PushSharp.Google/GcmNotification.cs
@@ -62,6 +62,7 @@ public bool IsDeviceRegistrationIdValid ()
             return RegistrationIds != null && RegistrationIds.Any ();
         }
 
+        [JsonIgnore]
         public object Tag { get;set; }
 
         [JsonProperty  ("message_id")]