diff --git a/public_html/includes/class/class.LSform.php b/public_html/includes/class/class.LSform.php
index fc0e5402..45e827d3 100644
--- a/public_html/includes/class/class.LSform.php
+++ b/public_html/includes/class/class.LSform.php
@@ -499,6 +499,28 @@ class LSform {
     }
   }
 
+  /**
+   * Check if form has a specified element (by attr name)
+   *
+   * @param[in] $attr string The element/attribute name
+   *
+   * @retval boolean
+   **/
+  public function hasElement($name) {
+    return isset($this -> elements[$name]);
+  }
+
+  /**
+   * Check if a specified element (by attr name) is freezed
+   *
+   * @param[in] $attr string The element/attribute name
+   *
+   * @retval boolean
+   **/
+  public function isFreeze($name) {
+    return isset($this -> elements[$name]) && $this -> elements[$name] -> isFreeze($name);
+  }
+
   /**
    * Ajoute une règle sur un élément du formulaire
    *
diff --git a/public_html/includes/class/class.LSldapObject.php b/public_html/includes/class/class.LSldapObject.php
index 09a2181b..4c58fef6 100644
--- a/public_html/includes/class/class.LSldapObject.php
+++ b/public_html/includes/class/class.LSldapObject.php
@@ -403,7 +403,9 @@ class LSldapObject {
     else {
       $LSform=false;
     }
-    foreach($this -> attrs as $attr) {
+    foreach($this -> attrs as $attr_name => $attr) {
+      if ($LSform && (!$LSform -> hasElement($attr_name) || $LSform -> isFreeze($attr_name)))
+        continue;
       $attr_values = $attr -> getValue();
       if (!$attr -> isValidate()) {
         if($attr -> isUpdate()) {