diff --git a/prototype/UI/index.html b/prototype/UI/index.html
index 92f36fcc8..b97b6b87b 100644
--- a/prototype/UI/index.html
+++ b/prototype/UI/index.html
@@ -75,7 +75,7 @@
     }
 
     function termFromJSON(json) {
-        return new Term({ extract: json.extract, unwrap: new Syntax(json.unwrap, function(x) { return termFromJSON(json); }) });
+        return new Term({ extract: json.extract, unwrap: new Syntax(json.unwrap, function(x) { return termFromJSON(x); }) });
     }
 
     function Term(object) {