diff --git a/src/Two/FacebookProvider.php b/src/Two/FacebookProvider.php
index 50d4d194..175d4f4b 100644
--- a/src/Two/FacebookProvider.php
+++ b/src/Two/FacebookProvider.php
@@ -122,8 +122,12 @@ protected function getUserByOIDCToken($token)
         throw_if($data['iss'] !== 'https://www.facebook.com', new Exception('Token has incorrect issuer.'));
 
         $data['id'] = $data['sub'];
-        $data['first_name'] = $data['given_name'];
-        $data['last_name'] = $data['family_name'];
+        if (isset($data['given_name'])) {
+            $data['first_name'] = $data['given_name'];
+        }
+        if (isset($data['family_name'])) {
+            $data['last_name'] = $data['family_name'];
+        }
 
         return $data;
     }