diff --git a/core/config.class.inc.php b/core/config.class.inc.php
index 9142889fc..e09ebcde5 100644
--- a/core/config.class.inc.php
+++ b/core/config.class.inc.php
@@ -632,8 +632,8 @@ class Config
 		'url_validation_pattern' => array(
 			'type' => 'string',
 			'description' => 'Regular expression to validate/detect the format of an URL (URL attributes and Wiki formatting for Text attributes)',
-			'default' => '(https?|ftp)\://([a-zA-Z0-9+!*(),;?&=\$_.-]+(\:[a-zA-Z0-9+!*(),;?&=\$_.-]+)?@)?([a-zA-Z0-9-.]{3,})(\:[0-9]{2,5})?(/([a-zA-Z0-9+\$_-]\.?)+)*/?(\?[a-zA-Z+&\$_.-][a-zA-Z0-9;:[\]@&%=+/\$_.-]*)?(#[a-zA-Z_.-][a-zA-Z0-9+\$_.-]*)?',
-			//            SHEME.......... USER....................... PASSWORD.......................... HOST/IP........... PORT.......... PATH....................... GET......................................... ANCHOR............................
+			'default' => '(https?|ftp)\://([a-zA-Z0-9+!*(),;?&=\$_.-]+(\:[a-zA-Z0-9+!*(),;?&=\$_.-]+)?@)?([a-zA-Z0-9-.]{3,})(\:[0-9]{2,5})?(/([a-zA-Z0-9%+\$_-]\.?)+)*/?(\?[a-zA-Z+&\$_.-][a-zA-Z0-9;:[\]@&%=+/\$_.-]*)?(#[a-zA-Z_.-][a-zA-Z0-9+\$_.-]*)?',
+			//            SHEME.......... USER....................... PASSWORD.......................... HOST/IP........... PORT.......... PATH........................ GET............................................ ANCHOR............................
 			// Example: http://User:passWord@127.0.0.1:8888/patH/Page.php?arrayArgument[2]=something:blah20#myAnchor
 			// Origin of this regexp: http://www.php.net/manual/fr/function.preg-match.php#93824
 			'value' => '',