diff --git a/app/Http/Controllers/PreferencesController.php b/app/Http/Controllers/PreferencesController.php
index 6ca63d2ef5..b29182f6d4 100644
--- a/app/Http/Controllers/PreferencesController.php
+++ b/app/Http/Controllers/PreferencesController.php
@@ -67,7 +67,7 @@ class PreferencesController extends Controller
     public function code(Google2FA $google2fa)
     {
         $domain = $this->getDomain();
-        $secret = $google2fa->generateSecretKey(16);
+        $secret = $google2fa->generateSecretKey();
         Session::flash('two-factor-secret', $secret);
         $image = $google2fa->getQRCodeInline('Firefly III at ' . $domain, auth()->user()->email, $secret, 150);