diff --git a/htdocs/core/lib/admin.lib.php b/htdocs/core/lib/admin.lib.php
index 2ce1e930f89..ec10142eb4e 100644
--- a/htdocs/core/lib/admin.lib.php
+++ b/htdocs/core/lib/admin.lib.php
@@ -1111,7 +1111,7 @@ function listOfSessions()
 						$idsess = $tmp[1];
 						$regs = array();
 						$arrayofSessions[$idsess]["login"] = '';
-						$loginfound = preg_match('/dol_login\|s:[0-9]+:"([A-Za-z0-9]+)"/i', $sessValues, $regs);
+						$loginfound = preg_match('/dol_login\|s:[0-9]+:"([^"]+)"/i', $sessValues, $regs);
 						if ($loginfound) {
 							$arrayofSessions[$idsess]["login"] = (string) $regs[1];
 						}