diff --git a/src/General/Index.coffee b/src/General/Index.coffee
index 8e5ebd73b..f9feef8c6 100644
--- a/src/General/Index.coffee
+++ b/src/General/Index.coffee
@@ -650,7 +650,7 @@ Index =
     RelativeDates.update timeEl
 
   parse: (pages) ->
-    $.cleanCache (url) -> /^\/\/a\.4cdn\.org\//.test url
+    $.cleanCache (url) -> /^https?:\/\/a\.4cdn\.org\//.test url
     Index.parseThreadList pages
     Index.changed.threads = true
     Index.pageLoad()