diff --git a/public_html/includes/class/class.LSattr_ldap_compositeValueToJSON.php b/public_html/includes/class/class.LSattr_ldap_compositeValueToJSON.php
index 2dd14589..b6232496 100644
--- a/public_html/includes/class/class.LSattr_ldap_compositeValueToJSON.php
+++ b/public_html/includes/class/class.LSattr_ldap_compositeValueToJSON.php
@@ -36,7 +36,7 @@ class LSattr_ldap_compositeValueToJSON extends LSattr_ldap {
    *
    * @retval mixed La valeur d'affichage de l'attribut
    */
-  public static function getDisplayValue($data) {
+  public function getDisplayValue($data) {
     if ($data) {
       if (!is_array($data))
         $data = array($data);
@@ -55,7 +55,7 @@ class LSattr_ldap_compositeValueToJSON extends LSattr_ldap {
    *
    * @retval mixed La valeur traitée de l'attribut
    */
-  public static function getUpdateData($data) {
+  public function getUpdateData($data) {
     if ($data) {
       if (!is_array($data))
         $data = array($data);
diff --git a/public_html/includes/class/class.LSattr_ldap_postaladdress.php b/public_html/includes/class/class.LSattr_ldap_postaladdress.php
index a8104e4f..f03d7b27 100644
--- a/public_html/includes/class/class.LSattr_ldap_postaladdress.php
+++ b/public_html/includes/class/class.LSattr_ldap_postaladdress.php
@@ -33,7 +33,7 @@ class LSattr_ldap_postaladdress extends LSattr_ldap {
    *
    * @retval mixed La valeur d'affichage de l'attribut
    */
-  public static function getDisplayValue($data) {
+  public function getDisplayValue($data) {
     return str_replace("$","\n",$data);
   }
 
@@ -44,7 +44,7 @@ class LSattr_ldap_postaladdress extends LSattr_ldap {
    *
    * @retval mixed La valeur traitée de l'attribut
    */
-  public static function getUpdateData($data) {
+  public function getUpdateData($data) {
     return str_replace("\n","$",$data);
   }
 
diff --git a/public_html/includes/class/class.LSattr_ldap_shadowExpire.php b/public_html/includes/class/class.LSattr_ldap_shadowExpire.php
index dc80588f..97cf44fd 100644
--- a/public_html/includes/class/class.LSattr_ldap_shadowExpire.php
+++ b/public_html/includes/class/class.LSattr_ldap_shadowExpire.php
@@ -35,7 +35,7 @@ class LSattr_ldap_shadowExpire extends LSattr_ldap {
    *
    * @retval mixed Array of timestamp
    */
-  public static function getDisplayValue($data) {
+  public function getDisplayValue($data) {
     $ret=array();
     foreach($data as $val) {
       $ret[]=((int)$val)*86400;
@@ -50,7 +50,7 @@ class LSattr_ldap_shadowExpire extends LSattr_ldap {
    *
    * @retval mixed LDAP attribute values
    */
-  public static function getUpdateData($data) {
+  public function getUpdateData($data) {
     $ret=array();
     foreach($data as $val) {
       $ret[]=round(((int)$val)/86400);