diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 593ccd53a63..fd5deb31c36 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -698,10 +698,12 @@ abstract class CommonObject
 			}
 			else return '';
 		}
-
 		// Define $urlwithroot
 		$urlwithouturlroot=preg_replace('/'.preg_quote(DOL_URL_ROOT,'/').'$/i','',trim($dolibarr_main_url_root));
-		$urlwithroot=$urlwithouturlroot.DOL_URL_ROOT;		// This is to use external domain name found into config file
+		// This is to use external domain name found into config file
+		//if (DOL_URL_ROOT && ! preg_match('/\/$/', $urlwithouturlroot) && ! preg_match('/^\//', DOL_URL_ROOT)) $urlwithroot=$urlwithouturlroot.'/'.DOL_URL_ROOT;
+		//else
+		$urlwithroot=$urlwithouturlroot.DOL_URL_ROOT;
 		//$urlwithroot=DOL_MAIN_URL_ROOT;					// This is to use same domain name than current
 
 		$forcedownload=0;