diff --git a/layout/includes/head.pug b/layout/includes/head.pug
index 9bbf993..4db8966 100644
--- a/layout/includes/head.pug
+++ b/layout/includes/head.pug
@@ -97,7 +97,7 @@ if theme.algolia_search.enable
   script(src=url_for(theme.CDN.algolia_search) defer)
 
 if (theme.gitalk && theme.gitalk.enable)
-  link(rel="stylesheet" type="text/css" href=url_for(gitalk_css))
+  link(rel="stylesheet" type="text/css" href=url_for(theme.CDN.gitalk_css))
   script(src=url_for(theme.CDN.gitalk))
   script(src=url_for(theme.CDN.blueimp-md5))