diff --git a/htdocs/accountancy/admin/categories.php b/htdocs/accountancy/admin/categories.php
index 11913c6d2e9..f9200a575be 100644
--- a/htdocs/accountancy/admin/categories.php
+++ b/htdocs/accountancy/admin/categories.php
@@ -46,7 +46,7 @@ if ($cat_id == 0) {
 }
 
 // Security check
-if (! $user->rights->accounting-->chartofaccount)
+if (empty($user->rights->accounting->chartofaccount))
 {
 	accessforbidden();
 }
@@ -164,4 +164,4 @@ if ($action == 'display' || $action == 'delete') {
 
 llxFooter();
 
-$db->close();
\ No newline at end of file
+$db->close();