diff --git a/htdocs/user/card.php b/htdocs/user/card.php
index dbe1764f54e..688ac6c28ac 100644
--- a/htdocs/user/card.php
+++ b/htdocs/user/card.php
@@ -417,8 +417,18 @@ if (empty($reshook)) {
 				$object->civility_code = GETPOST("civility_code", 'aZ09');
 				$object->lastname = GETPOST("lastname", 'alphanohtml');
 				$object->firstname = GETPOST("firstname", 'alphanohtml');
-				$object->ref_employee = GETPOST("ref_employee", 'alphanohtml');
-				$object->national_registration_number = GETPOST("national_registration_number", 'alphanohtml');
+				/*
+				* Protection against deletion of ref_employee while the field is not present in the user tab
+				*/
+				if (GETPOSTISSET("ref_employee")) {
+					$object->ref_employee = GETPOST("ref_employee", 'alphanohtml');
+				}
+				/*
+				* Protection against deletion of national_registration_number while the field is not present in the user tab
+				*/
+				if (GETPOSTISSET("national_registration_number")) {
+					$object->national_registration_number = GETPOST("national_registration_number", 'alphanohtml');
+				}
 				$object->gender = GETPOST("gender", 'aZ09');
 				$object->pass = GETPOST("password", 'none');	// We can keep 'none' for password fields
 				$object->api_key = (GETPOST("api_key", 'alphanohtml')) ? GETPOST("api_key", 'alphanohtml') : $object->api_key;
diff --git a/htdocs/user/param_ihm.php b/htdocs/user/param_ihm.php
index 3d2e3240ce3..136da34e1bd 100644
--- a/htdocs/user/param_ihm.php
+++ b/htdocs/user/param_ihm.php
@@ -215,6 +215,16 @@ if (isModEnabled('ticket')) {
 	$tmparray['ticket/list.php?mainmenu=ticket&leftmenu='] = 'Tickets';
 }
 
+// Hook for insertion new items in the List of possible landing pages
+$reshook = $hookmanager->executeHooks('addToLandingPageList', $tmparray, $object);
+if ($reshook < 0) {
+	setEventMessages($hookmanager->error, $hookmanager->errors, 'errors');
+} elseif ($reshook > 0) {
+	$tmparray=$hookmanager->resArray;
+} elseif ($reshook == 0) {
+	$tmparray=array_merge($tmparray, $hookmanager->resArray);
+}
+
 $head = user_prepare_head($object);
 
 $title = $langs->trans("User");