diff --git a/lib/ace/ext/modelist.js b/lib/ace/ext/modelist.js
index a008a6d8..536d9430 100644
--- a/lib/ace/ext/modelist.js
+++ b/lib/ace/ext/modelist.js
@@ -140,7 +140,7 @@ for (var name in supportedModes) {
     var data = supportedModes[name];
     var displayName = nameOverrides[name] || name;
     var filename = name.toLowerCase();
-    mode = new Mode(filename, displayName, data[0]);
+    var mode = new Mode(filename, displayName, data[0]);
     modesByName[filename] = mode;
     modes.push(mode);
 }