diff --git a/4chan_x.js b/4chan_x.js
index c8f463ed9..5a85501d8 100644
--- a/4chan_x.js
+++ b/4chan_x.js
@@ -1319,6 +1319,7 @@
           }
           s = d.title.match(/.+- /)[0];
           s += '404';
+          Favicon.update();
           return;
         }
         br = $('br[clear]');
diff --git a/script.coffee b/script.coffee
index f931b77e2..cb13637bc 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1034,8 +1034,7 @@ updater =
           input.value = 404
         s = d.title.match(/.+- /)[0]
         s += '404'
-        # TODO
-        #updateFavicon()
+        Favicon.update()
         return
 
       br = $ 'br[clear]'