diff --git a/Yugen.Mosaic.Uwp/Models/Tile.cs b/Yugen.Mosaic.Uwp/Models/Tile.cs
index 1ac3899..99b72bf 100644
--- a/Yugen.Mosaic.Uwp/Models/Tile.cs
+++ b/Yugen.Mosaic.Uwp/Models/Tile.cs
@@ -40,8 +40,8 @@ public void Process(Size tileSize, IRandomAccessStream RandomAccessStream)
 
         public void Dispose()
         {
-            ResizedImage.Dispose();
+            ResizedImage?.Dispose();
             ResizedImage = null;
         }
     }
-}
\ No newline at end of file
+}