diff --git a/Toasts.Forms.Plugin.Droid/NotificationBuilder.cs b/Toasts.Forms.Plugin.Droid/NotificationBuilder.cs
index 7a76b5c..1d139f3 100644
--- a/Toasts.Forms.Plugin.Droid/NotificationBuilder.cs
+++ b/Toasts.Forms.Plugin.Droid/NotificationBuilder.cs
@@ -306,7 +306,7 @@ void TimerFinished(string id, bool cancel, bool allowTapInNotificationCenter)
             if (!allowTapInNotificationCenter || cancel)
                 if (ResetEvent.ContainsKey(id))
                 {
-                    if (EventResult != null)
+                    if (EventResult != null && !EventResult.ContainsKey(id))
                     {
                         EventResult.Add(id, new NotificationResult() { Action = NotificationAction.Timeout, Id = int.Parse(id) });
                     }
@@ -376,4 +376,4 @@ public override void OnReceive(Context context, Intent intent)
         }
     }
 
-}
\ No newline at end of file
+}