diff --git a/phpBB/includes/bbcode.php b/phpBB/includes/bbcode.php
index e308310f5c..33582db1b9 100644
--- a/phpBB/includes/bbcode.php
+++ b/phpBB/includes/bbcode.php
@@ -198,19 +198,19 @@ function bbencode_second_pass($text, $uid)
 	$replacements[0] = $bbcode_tpl['img'];
 	
 	// [url]xxxx://www.phpbb.com[/url] code..
-	$patterns[1] = "#\[url\]([a-z]+?://){1}([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+]+)\[/url\]#si";
+	$patterns[1] = "#\[url\]([a-z]+?://){1}([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\[/url\]#si";
 	$replacements[1] = $bbcode_tpl['url1'];
 
 	// [url]www.phpbb.com[/url] code.. (no xxxx:// prefix).
-	$patterns[2] = "#\[url\]([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+]+)\[/url\]#si";
+	$patterns[2] = "#\[url\]([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\[/url\]#si";
 	$replacements[2] = $bbcode_tpl['url2'];
 
 	// [url=xxxx://www.phpbb.com]phpBB[/url] code..
-	$patterns[3] = "#\[url=([a-z]+?://){1}([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+]+)\](.*?)\[/url\]#si";
+	$patterns[3] = "#\[url=([a-z]+?://){1}([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\](.*?)\[/url\]#si";
 	$replacements[3] = $bbcode_tpl['url3'];
 
 	// [url=www.phpbb.com]phpBB[/url] code.. (no xxxx:// prefix).
-	$patterns[4] = "#\[url=([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+]+)\](.*?)\[/url\]#si";
+	$patterns[4] = "#\[url=([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\](.*?)\[/url\]#si";
 	$replacements[4] = $bbcode_tpl['url4'];
 
 	// [email]user@domain.tld[/email] code..