diff --git a/core/flyout_vertical.ts b/core/flyout_vertical.ts
index d0c4a5d585e..6071218584e 100644
--- a/core/flyout_vertical.ts
+++ b/core/flyout_vertical.ts
@@ -319,7 +319,7 @@ export class VerticalFlyout extends Flyout {
 
     if (this.toolboxPosition_ === toolbox.Position.LEFT) {
       const width = flyoutRect.width;
-      return new Rect(-BIG_NUM, BIG_NUM, -BIG_NUM, left + width);
+      return new Rect(-BIG_NUM, BIG_NUM, left, left + width);
     } else {
       // Right
       return new Rect(-BIG_NUM, BIG_NUM, left, BIG_NUM);