diff --git a/core/flyout_vertical.js b/core/flyout_vertical.js
index 90b0d9765..a09b3fb8e 100644
--- a/core/flyout_vertical.js
+++ b/core/flyout_vertical.js
@@ -375,6 +375,7 @@ Blockly.VerticalFlyout.prototype.reflowInternal_ = function() {
     // Record the width for workspace metrics and .position.
     this.width_ = flyoutWidth;
     this.position();
+    this.targetWorkspace.recordDragTargets();
   }
 };