diff --git a/Paint_2/Form1.cs b/Paint_2/Form1.cs
index 4bb5639..b1f043a 100644
--- a/Paint_2/Form1.cs
+++ b/Paint_2/Form1.cs
@@ -96,7 +96,7 @@ namespace Paint_2
             DebugLabel.Text = "";
 
             PaintTool currentTool = Project.GetCurrentTool(SelectedLayers);
-            if (currentTool.NeedsFullRefresh)
+            if (currentTool != null && currentTool.NeedsFullRefresh)
             {
                 canvas.Image = Project.ForcePaintLayers();
             }