diff --git a/htdocs/categories/index.php b/htdocs/categories/index.php
index d6a314791c8..06b70616792 100644
--- a/htdocs/categories/index.php
+++ b/htdocs/categories/index.php
@@ -66,7 +66,7 @@ $arrayofcss=array('/includes/jquery/plugins/jquerytreeview/jquery.treeview.css')
 llxHeader('',$title,'','',0,0,$arrayofjs,$arrayofcss);
 
 $newcardbutton='';
-if($user->rights->categorie->creer) {
+if (! empty($user->rights->categorie->creer)) {
     $newcardbutton = '<a class="butActionNew" href="'.DOL_URL_ROOT.'/categories/card.php?action=create&type='.$type.'&backtopage='.urlencode($_SERVER["PHP_SELF"].'?type='.$type).'"><span class="valignmiddle">'.$langs->trans("NewCategory").'</span>';
     $newcardbutton.= '<span class="fa fa-plus-circle valignmiddle"></span>';
     $newcardbutton.= '</a>';