diff --git a/main/inc/lib/api.lib.php b/main/inc/lib/api.lib.php
index d5e1ee5bd9..33c0c55f35 100644
--- a/main/inc/lib/api.lib.php
+++ b/main/inc/lib/api.lib.php
@@ -1327,6 +1327,7 @@ function _api_format_user($user, $add_password = false, $loadAvatars = true)
 
     $result['firstname'] = null;
     $result['lastname'] = null;
+
     if (isset($user['firstname']) && isset($user['lastname'])) { // with only lowercase
         $result['firstname'] = $user['firstname'];
         $result['lastname'] = $user['lastname'];
@@ -1361,8 +1362,10 @@ function _api_format_user($user, $add_password = false, $loadAvatars = true)
         'registration_date',
         'hr_dept_id',
         'expiration_date',
-        'last_login'
+        'last_login',
+        'user_is_online'
     );
+
     if (api_get_setting('extended_profile') === 'true') {
         $attributes[] = 'competences';
         $attributes[] = 'diplomas';