diff --git a/include/js/jquery-ui.js b/include/js/jquery-ui.js
index 15eb54828..b5e6cf5f7 100644
--- a/include/js/jquery-ui.js
+++ b/include/js/jquery-ui.js
@@ -20,8 +20,10 @@
 
 $.ui = $.ui || {};
 
-var version = $.ui.version = "1.14.1";
+/* for backward compatibility */
+$.uiBackCompat = true;
 
+var version = $.ui.version = "1.14.1";
 
 /*!
  * jQuery UI Widget 1.14.1
@@ -18806,4 +18808,4 @@ var widgetsTooltip = $.ui.tooltip;
 
 
 
-} );
\ No newline at end of file
+} );