diff --git a/ui/jquery.ui.autocomplete.js b/ui/jquery.ui.autocomplete.js
index 09c3707f0a..3e01636822 100644
--- a/ui/jquery.ui.autocomplete.js
+++ b/ui/jquery.ui.autocomplete.js
@@ -263,6 +263,7 @@ $.widget( "ui.autocomplete", {
 	},
 
 	_destroy: function() {
+		clearTimeout( this.searching );
 		this.element
 			.removeClass( "ui-autocomplete-input" )
 			.removeAttr( "autocomplete" )