diff --git a/src/contracts/Repository/UserService.php b/src/contracts/Repository/UserService.php
index faf485aca0..58aec8f8f8 100644
--- a/src/contracts/Repository/UserService.php
+++ b/src/contracts/Repository/UserService.php
@@ -165,6 +165,7 @@ public function loadUser(int $userId, array $prioritizedLanguages = []): User;
      * @return \Ibexa\Contracts\Core\Repository\Values\User\User
      *
      * @throws \Ibexa\Contracts\Core\Repository\Exceptions\NotFoundException if a user with the given credentials was not found
+     * @throws \Ibexa\Contracts\Core\Repository\Exceptions\InvalidArgumentException
      */
     public function loadUserByLogin(string $login, array $prioritizedLanguages = []): User;
 
@@ -187,6 +188,7 @@ public function checkUserCredentials(User $user, string $credentials): bool;
      * @return \Ibexa\Contracts\Core\Repository\Values\User\User
      *
      * @throws \Ibexa\Contracts\Core\Repository\Exceptions\InvalidArgumentException
+     * @throws \Ibexa\Contracts\Core\Repository\Exceptions\NotFoundException
      */
     public function loadUserByEmail(string $email, array $prioritizedLanguages = []): User;