diff --git a/hook.php b/hook.php
index f234bec..bbc196d 100644
--- a/hook.php
+++ b/hook.php
@@ -36,10 +36,10 @@
 // And to save it in the session
 function plugin_change_profile_example() {
    // For example : same right of computer
-   if (Session::haveRight('computer', 'w')) {
+   if (Session::haveRight('computer', UPDATE)) {
       $_SESSION["glpi_plugin_example_profile"] = array('example' => 'w');
 
-   } else if (Session::haveRight('computer', 'r')) {
+   } else if (Session::haveRight('computer', READ)) {
       $_SESSION["glpi_plugin_example_profile"] = array('example' => 'r');
 
    } else {
diff --git a/inc/child.class.php b/inc/child.class.php
index 3ed3701..37ac675 100644
--- a/inc/child.class.php
+++ b/inc/child.class.php
@@ -56,28 +56,28 @@ class PluginExampleChild extends CommonDBChild {
    // * $mustBeAttached: some CommonDBChild can be free, without any parent.
    static function canCreate() {
 
-      return (Session::haveRight('internet', 'w')
+      return (Session::haveRight('internet', UPDATE)
               && parent::canCreate());
    }
 
 
    static function canView() {
 
-      return (Session::haveRight('internet', 'r')
+      return (Session::haveRight('internet', READ)
               && parent::canView());
    }
 
 
    static function canUpdate() {
 
-      return (Session::haveRight('internet', 'w')
+      return (Session::haveRight('internet', UPDATE)
               && parent::canUpdate());
    }
 
 
    static function canDelete() {
 
-      return (Session::haveRight('internet', 'w')
+      return (Session::haveRight('internet', DELETE)
               && parent::canDelete());
    }