diff --git a/config/example-config.php b/config/example-config.php
index 4175c22e..4a4cccdd 100644
--- a/config/example-config.php
+++ b/config/example-config.php
@@ -704,7 +704,7 @@ $c->admin_email = 'calendar-admin@example.com';
 //     'filterGroups' => 'objectClass=groupOfUniqueNames',
        /* /!\ "username" should be set and "modified" must be set
         * used to create the user based on their ldap properties */
-//     'mapping_field' => array(
+//     'user_mapping_field' => array(
 //         "username" => "uid",
 //         "modified" => "modifyTimestamp",
 //         "fullname" => "cn",
diff --git a/inc/drivers_ldap.php b/inc/drivers_ldap.php
index 05c4055a..b855fe21 100644
--- a/inc/drivers_ldap.php
+++ b/inc/drivers_ldap.php
@@ -643,6 +643,14 @@ function sync_LDAP_groups(){
   if ( sizeof ( $groups_to_update ) ){
     $c->messages[] = sprintf(i18n('- updating groups : %s'),join(', ',$groups_to_update));
 
+    // Support the old name of user_mapping_field..
+    $user_mapping = NULL;
+    if (isset($c->authenticate_hook['config']['user_mapping_field'])) {
+      $user_mapping = $c->authenticate_hook['config']['user_mapping_field'];
+    } else if (isset($c->authenticate_hook['config']['mapping_field'])) {
+      $user_mapping = $c->authenticate_hook['config']['mapping_field'];
+    }
+
     foreach ( $groups_to_update as $group ){
       $db_members = is_array( $db_group_members[$group] )
           ? array_values( $db_group_members[$group] )
@@ -651,12 +659,10 @@ function sync_LDAP_groups(){
           ? array_values ( $ldap_groups_info[$group][$member_field] )
           : array();
 
-      $mapping_field = $c->authenticate_hook['config']['mapping_field'];
-
       if (isset($c->authenticate_hook['config']['group_match_username_attr'])
-          && isset($mapping_field['username'])) {
+          && isset($user_mapping['username'])) {
         $query = $ldapDriver->ldap_query_one;
-        $username_ldap_attribute = $mapping_field['username'];
+        $username_ldap_attribute = $user_mapping['username'];
         $filter = "(objectCategory=person)";
 
         $ldap_members_tmp = array();
@@ -757,7 +763,14 @@ function sync_LDAP(){
   $ldapDriver = getStaticLdap();
   if ( ! $ldapDriver->valid ) return;
 
-  $mapping = $c->authenticate_hook['config']['mapping_field'];
+  // Support the old name of user_mapping_field.
+  $mapping = NULL;
+  if (isset($c->authenticate_hook['config']['user_mapping_field'])) {
+      $mapping = $c->authenticate_hook['config']['user_mapping_field'];
+  } else if (isset($c->authenticate_hook['config']['mapping_field'])) {
+      $mapping = $c->authenticate_hook['config']['mapping_field'];
+  }
+
   $attributes = array_values_mapping($mapping);
   $ldap_users_tmp = $ldapDriver->getAllUsers($attributes);
 
diff --git a/testing/regression-conf.php.example b/testing/regression-conf.php.example
index d14c7b89..0e5cc921 100644
--- a/testing/regression-conf.php.example
+++ b/testing/regression-conf.php.example
@@ -32,6 +32,7 @@
   //ldap   'protocolVersion' => 3,
   //ldap   'baseDNUsers'     => 'ou=users,dc=example,dc=com',
   //ldap   'baseDNGroups'    => 'ou=groups,dc=example,dc=com',
+  // Test with the old name, new name is "user_mapping_field".
   //ldap   'mapping_field'   => array(
   //ldap       "username" => "uid",
   //ldap       "modified" => "modifyTimestamp",