diff --git a/main/inc/lib/api.lib.php b/main/inc/lib/api.lib.php
index 5ca8d89257..708b95fc89 100644
--- a/main/inc/lib/api.lib.php
+++ b/main/inc/lib/api.lib.php
@@ -1260,13 +1260,13 @@ function api_is_self_registration_allowed()
  *
  * example: The function can be used to check if a user is logged in
  *          if (api_get_user_id())
- * @return integer the id of the current user, 0 if is empty
+ * @return int the id of the current user, 0 if is empty
  */
 function api_get_user_id()
 {
     $userInfo = Session::read('_user');
     if ($userInfo && isset($userInfo['user_id'])) {
-        return $userInfo['user_id'];
+        return (int) $userInfo['user_id'];
     }
     return 0;
 }