diff --git a/blocks.js b/blocks.js
index 9667e68d..9f8a2a43 100644
--- a/blocks.js
+++ b/blocks.js
@@ -5911,6 +5911,7 @@ ScriptsMorph.prototype.redrop = function () {
     if (this.dropRecord.action === 'delete') {
         this.recoverLastDrop(true);
         this.dropRecord.lastDroppedBlock.destroy();
+        this.updateUndropControls();
     } else {
         this.isAnimating = true;
         this.dropRecord.lastDroppedBlock.slideBackTo(