diff --git a/Facepunch.Steamworks/Interfaces/Workshop.cs b/Facepunch.Steamworks/Interfaces/Workshop.cs
index a305af2..504e3d5 100644
--- a/Facepunch.Steamworks/Interfaces/Workshop.cs
+++ b/Facepunch.Steamworks/Interfaces/Workshop.cs
@@ -67,7 +67,7 @@ public void Dispose()
 
         private void onItemInstalled( SteamNative.ItemInstalled_t obj, bool failed )
         {
-            if ( OnItemInstalled != null )
+            if ( OnItemInstalled != null && obj.AppID == Client.Instance.AppId )
                 OnItemInstalled( obj.PublishedFileId );
         }