diff --git a/src/ui/BlockPalette.as b/src/ui/BlockPalette.as
index 8e0e326..b7f1e50 100644
--- a/src/ui/BlockPalette.as
+++ b/src/ui/BlockPalette.as
@@ -53,7 +53,6 @@ public class BlockPalette extends ScrollFrameContents {
 
 	public function handleDrop(obj:*):Boolean {
 		// Delete blocks and stacks dropped onto the palette.
-		var app:Scratch = root as Scratch;
 		var c:ScratchComment = obj as ScratchComment;
 		if (c) {
 			c.x = c.y = 20; // postion for undelete