diff --git a/mode/clike/clike.js b/mode/clike/clike.js
index 66443fb88b..c57ed98398 100644
--- a/mode/clike/clike.js
+++ b/mode/clike/clike.js
@@ -21,7 +21,7 @@ CodeMirror.defineMode("clike", function(config, parserConfig) {
     }
     if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
       curPunc = ch;
-      return null
+      return null;
     }
     if (/\d/.test(ch)) {
       stream.eatWhile(/[\w\.]/);