diff --git a/toolkit/content/aboutAbout.html b/toolkit/content/aboutAbout.html
index 74702381dd1bed2d4bb47c464ae0ca309c10e45b..f1e6b34bbf29d787bd62d625707dead024cf6011 100644
--- a/toolkit/content/aboutAbout.html
+++ b/toolkit/content/aboutAbout.html
@@ -24,6 +24,7 @@
       href="chrome://branding/content/icon32.png"
     />
     <script src="chrome://global/content/aboutAbout.js"></script>
+    <script src="chrome://browser/content/zenThemeModifier.js"></script>
   </head>
 
   <body>
