diff --git a/src/Environment.php b/src/Environment.php
index be182c827..349d8efd8 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -119,7 +119,7 @@ class Environment
         $this->debug = (bool) $options['debug'];
         $this->setCharset($options['charset']);
         $this->baseTemplateClass = '\\'.ltrim($options['base_template_class'], '\\');
-        if (Template::class !== $this->baseTemplateClass && '\Twig_Template' !== $this->baseTemplateClass) {
+        if ('\\'.Template::class !== $this->baseTemplateClass && '\Twig_Template' !== $this->baseTemplateClass) {
             @trigger_error('The "base_template_class" option on '.__CLASS__.' is deprecated since Twig 2.7.0.', E_USER_DEPRECATED);
         }
         $this->autoReload = null === $options['auto_reload'] ? $this->debug : (bool) $options['auto_reload'];