diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 6ffd5a088e8..fa3a8c1cd43 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -1813,7 +1813,7 @@ function top_menu_user(User $user, Translate $langs)
     <div id="topmenu-login-dropdown" class="userimg atoplogin dropdown user user-menu">
         <a href="'.DOL_URL_ROOT.'/user/card.php?id='.$user->id.'" class="dropdown-toggle" data-toggle="dropdown">
             '.$userImage.'
-            <span class="hidden-xs maxwidth200 atoploginusername">'.dol_trunc($user->firstname ? $user->firstname : $user->login, 11).'</span>
+            <span class="hidden-xs maxwidth200 atoploginusername">'.dol_trunc($user->firstname ? $user->firstname : $user->login, 10).'</span>
             <span class="fa fa-chevron-down" id="dropdown-icon-down"></span>
             <span class="fa fa-chevron-up hidden" id="dropdown-icon-up"></span>
         </a>