diff --git a/core/misc/autocomplete.js b/core/misc/autocomplete.js
index f826281..7b2529a 100644
--- a/core/misc/autocomplete.js
+++ b/core/misc/autocomplete.js
@@ -131,7 +131,7 @@
       showSuggestions(autocomplete.cache[elementId][term]);
     }
     else {
-      var options = $.extend({success: sourceCallbackHandler, data: {q: term}}, autocomplete.ajax);
+      var options = $.extend(true, {success: sourceCallbackHandler, data: {q: term}}, autocomplete.ajax);
       $.ajax(this.element.attr('data-autocomplete-path'), options);
     }
   }