diff --git a/src/Symfony/Bridge/Twig/Mime/NotificationEmail.php b/src/Symfony/Bridge/Twig/Mime/NotificationEmail.php
index e6b28c4db43d2..1a58aa5e5e5bc 100644
--- a/src/Symfony/Bridge/Twig/Mime/NotificationEmail.php
+++ b/src/Symfony/Bridge/Twig/Mime/NotificationEmail.php
@@ -43,7 +43,7 @@ public function __construct(Headers $headers = null, AbstractPart $body = null)
     {
         $missingPackages = [];
         if (!class_exists(CssInlinerExtension::class)) {
-            $missingPackages['twig/cssinliner-extra'] = ' CSS Inliner';
+            $missingPackages['twig/cssinliner-extra'] = 'CSS Inliner';
         }
 
         if (!class_exists(InkyExtension::class)) {