diff --git a/core/config.class.inc.php b/core/config.class.inc.php
index 90d13edb8..d433d2987 100644
--- a/core/config.class.inc.php
+++ b/core/config.class.inc.php
@@ -886,7 +886,7 @@ class Config
 			'type' => 'string',
 			'description' => 'Regular expression to validate/detect the format of an URL (URL attributes and Wiki formatting for Text attributes)',
 			'default' => /** @lang RegExp */
-			'(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+\$_.-]*)?',
+			'(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-Z0-9_.-][a-zA-Z0-9+\$_.-]*)?',
 			// SCHEME....... 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
 			// RegExp source: http://www.php.net/manual/fr/function.preg-match.php#93824
diff --git a/test/core/AttributeURLDefaultPattern.php b/test/core/AttributeURLDefaultPattern.php
index bf647db2d..9230bbd4b 100644
--- a/test/core/AttributeURLDefaultPattern.php
+++ b/test/core/AttributeURLDefaultPattern.php
@@ -9,6 +9,6 @@ class AttributeURLDefaultPattern extends AttributeURL {
 	{
 		/** @noinspection OneTimeUseVariablesInspection */
 		$oConfig = utils::GetConfig();
-		return $oConfig->GetDefault('url_validation_pattern');
+		return '^'.$oConfig->GetDefault('url_validation_pattern').'$';
 	}
 }
diff --git a/test/core/AttributeURLTest.php b/test/core/AttributeURLTest.php
index 5f937830a..1eda57464 100644
--- a/test/core/AttributeURLTest.php
+++ b/test/core/AttributeURLTest.php
@@ -39,6 +39,7 @@ class AttributeURLTest extends ItopTestCase {
 			'Sharepoint URL 2' => ['https://mydomain2.sharepoint.com/:u:/r/sites/DIS/ITSM/00_Admin_iTOP/iTop%20-%20Upgrade%20manuel/Procedure%20upgrade%20Combodo.url?csf=1&web=1&e=DAF0i3', 1],
 			'Alfresco URL 2' => ['http://alfresco.mydomain3.org/share/page/site/books/document-details?nodeRef=workspace://SpacesStore/6274f55f-a25b-4762-a863-77f7066f2034', 1],
 			'SF URL' => ['https://sourceforge.net/p/itop/discussion/customizing-itop/thread/707145b859/?limit=25#f53c', 1],
+			'SF URL anchor starting with digit' => ['https://sourceforge.net/p/itop/discussion/customizing-itop/thread/b0a2d474ba/?limit=25#2b35', 1],
 		];
 	}
 }