diff --git a/popup/popup.js b/popup/popup.js
index 8655145e..2c5228b8 100644
--- a/popup/popup.js
+++ b/popup/popup.js
@@ -1,7 +1,7 @@
 /* global configDialog hotkeys onTabReady msg
   getActiveTab FIREFOX getTabRealURL URLS API onDOMready $ $$ prefs CHROME
   setupLivePrefs template t $create tWordBreak animateElement
-  tryJSONparse debounce CHROME_HAS_BORDER_BUG */
+  tryJSONparse debounce CHROME_HAS_BORDER_BUG capitalize */
 
 'use strict';
 
@@ -348,10 +348,6 @@ function createStyleElement(style) {
   return entry;
 }
 
-function capitalize(s) {
-  return s[0].toUpperCase() + s.slice(1);
-}
-
 function styleExcluded({exclusions}, type) {
   if (!exclusions) {
     return false;