diff --git a/components/Account.php b/components/Account.php
index db5d6dd..80c267d 100644
--- a/components/Account.php
+++ b/components/Account.php
@@ -194,6 +194,7 @@ public function onSignin()
              */
             $data = post();
             $rules = [];
+            $messages = [];
 
             $rules['login'] = $this->loginAttribute() == UserSettings::LOGIN_USERNAME
                 ? 'required|between:2,255'
@@ -201,13 +202,17 @@ public function onSignin()
 
             $rules['password'] = 'required|between:' . UserModel::getMinPasswordLength() . ',255';
 
+            $messages['login'] = $this->loginAttribute() == UserSettings::LOGIN_USERNAME
+                ? trans('winter.user::lang.account.invalid_username')
+                : trans('winter.user::lang.account.invalid_email');
+
             if (!array_key_exists('login', $data)) {
                 $data['login'] = post('username', post('email'));
             }
 
             $data['login'] = trim($data['login']);
 
-            $validation = Validator::make($data, $rules);
+            $validation = Validator::make($data, $rules, $messages);
             if ($validation->fails()) {
                 throw new ValidationException($validation);
             }
diff --git a/lang/de/lang.php b/lang/de/lang.php
index ef618c2..0ef6614 100644
--- a/lang/de/lang.php
+++ b/lang/de/lang.php
@@ -182,6 +182,8 @@
     'force_secure_desc' => 'Verwende für Weiterleitungen immer das HTTPS-Protokoll.',
     'invalid_activation_code' => 'Ungültiger Aktivierungscode übermittelt',
     'invalid_deactivation_pass' => 'Das eingegebene Passwort war ungültig.',
+    'invalid_username' => 'Der eingegebene Nutzername ist ungültig.',
+    'invalid_email' => 'Die eingegebene E-Mail ist ungültig.',
     'success_activation' => 'Benutzerkonto erfolgreich aktiviert.',
     'success_deactivation' => 'Konto erfolgreich deaktiviert. Schade, dass du gehst!',
     'success_saved' => 'Einstellungen erfolgreich gespeichert!',
diff --git a/lang/en/lang.php b/lang/en/lang.php
index 9164c1d..38abf4d 100644
--- a/lang/en/lang.php
+++ b/lang/en/lang.php
@@ -178,6 +178,8 @@
         'invalid_activation_code' => 'Invalid activation code supplied.',
         'invalid_deactivation_pass' => 'The password you entered was invalid.',
         'invalid_current_pass' => 'The current password you entered was invalid.',
+        'invalid_username' => 'The username you have entered is invalid.',
+        'invalid_email' => 'The email address you have entered is invalid.',
         'success_activation' => 'Successfully activated your account.',
         'success_deactivation' => 'Successfully deactivated your account. Sorry to see you go!',
         'success_saved' => 'Settings successfully saved!',