diff --git a/classes/Cookie.php b/classes/Cookie.php
index 6f9337108..655ada642 100644
--- a/classes/Cookie.php
+++ b/classes/Cookie.php
@@ -107,7 +107,7 @@ class CookieCore
 			{
 				if ($shared_url != $out[4])
 					continue;
-				if (preg_match('/^(?:.*\.)?([^.]*(?:.{2,3})?\..{2,3})$/Ui', $shared_url, $res))
+				if (preg_match('/^(?:.*\.)?([^.]*(?:.{2,4})?\..{2,3})$/Ui', $shared_url, $res))
 				{
 					$domain = '.'.$res[1];
 					break;