diff --git a/src/tile.js b/src/tile.js
index de1eb40d..28977f7d 100644
--- a/src/tile.js
+++ b/src/tile.js
@@ -358,8 +358,8 @@ $.Tile.prototype = {
             context.clearRect(
                 position.x + 1,
                 position.y + 1,
-                size.x - 2,
-                size.y - 2
+                size.x - 1,
+                size.y - 1
             );
         }