diff --git a/src/Symfony/Bridge/Twig/Extension/FormExtension.php b/src/Symfony/Bridge/Twig/Extension/FormExtension.php
index 7ba3d17cd882..1314e6544200 100644
--- a/src/Symfony/Bridge/Twig/Extension/FormExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/FormExtension.php
@@ -18,7 +18,6 @@
 use Symfony\Component\Form\FormView;
 use Twig\Environment;
 use Twig\Extension\AbstractExtension;
-use Twig\Extension\InitRuntimeInterface;
 use Twig\TwigFilter;
 use Twig\TwigFunction;
 use Twig\TwigTest;
@@ -41,7 +40,7 @@ public function __construct($renderer = null)
         if ($renderer instanceof TwigRendererInterface) {
             @trigger_error(sprintf('Passing a Twig Form Renderer to the "%s" constructor is deprecated since Symfony 3.2 and won\'t be possible in 4.0. Pass the Twig\Environment to the TwigRendererEngine constructor instead.', static::class), E_USER_DEPRECATED);
         } elseif (null !== $renderer && !(\is_array($renderer) && isset($renderer[0], $renderer[1]) && $renderer[0] instanceof ContainerInterface)) {
-            throw new \InvalidArgumentException(sprintf('Passing any arguments the constructor of %s is reserved for internal use.', __CLASS__));
+            throw new \InvalidArgumentException(sprintf('Passing any arguments to the constructor of %s is reserved for internal use.', __CLASS__));
         }
         $this->renderer = $renderer;
     }
diff --git a/src/Symfony/Bridge/Twig/Extension/InitRuntimeInterface.php b/src/Symfony/Bridge/Twig/Extension/InitRuntimeInterface.php
new file mode 100644
index 000000000000..5ba5e5570259
--- /dev/null
+++ b/src/Symfony/Bridge/Twig/Extension/InitRuntimeInterface.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Twig\Extension;
+
+use Twig\Extension\InitRuntimeInterface as TwigInitRuntimeInterface;
+
+/**
+ * @deprecated to be removed in 4.x
+ *
+ * @internal to be removed in 4.x
+ */
+interface InitRuntimeInterface extends TwigInitRuntimeInterface
+{
+}