diff --git a/4chan_x.user.js b/4chan_x.user.js
index b1334e93f..e0b554b08 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -3506,6 +3506,7 @@
         return;
       }
       if (!$.id('navtopr')) return;
+      $.addClass(d.body, "chanx_" + (VERSION.match(/\.(\d+)/)[1]));
       $.addClass(d.body, engine);
       threading.init();
       Favicon.init();
diff --git a/script.coffee b/script.coffee
index 4ebedb04c..d6902e78c 100644
--- a/script.coffee
+++ b/script.coffee
@@ -2743,6 +2743,7 @@ Main =
       return
     if not $.id 'navtopr'
       return
+    $.addClass d.body, "chanx_#{VERSION.match(/\.(\d+)/)[1]}"
     $.addClass d.body, engine
     threading.init()
     Favicon.init()