diff --git a/prototype/UI/index.html b/prototype/UI/index.html
index ecd81e0c2..193779be4 100644
--- a/prototype/UI/index.html
+++ b/prototype/UI/index.html
@@ -53,7 +53,7 @@
         return node;
     }
 
-    function term(term) {
+    function term(term, element) {
         if (term["extract"] == null || term["unwrap"] == null) { return; }
         // fixme: do something…?
     }