diff --git a/ui/jquery.ui.autocomplete.js b/ui/jquery.ui.autocomplete.js
index 26dc0895c33..ff7a93bfc6c 100644
--- a/ui/jquery.ui.autocomplete.js
+++ b/ui/jquery.ui.autocomplete.js
@@ -247,6 +247,9 @@ $.widget("ui.autocomplete", {
 		if (ul.width() <= this.element.width()) {
 			ul.width(this.element.width());
 		}
+		if ($.fn.bgiframe) {
+			ul.bgiframe();
+		}
 	},
 
 	_move: function(direction, event) {