diff --git a/templates/system/page.html.twig b/templates/system/page.html.twig
index f3e9ed2a1b14eb4167f50d21a989610c9baef246..1857806058098b87ffa719aaf6516a418f0ac7f4 100644
--- a/templates/system/page.html.twig
+++ b/templates/system/page.html.twig
@@ -68,7 +68,7 @@
       ]
     %}
     <header{{ navbar_attributes.addClass(navbar_classes) }} id="navbar" role="banner">
-      {% if not navbar_attributes.hasClass('container') %}
+      {% if not navbar_attributes.hasClass(container) %}
         <div class="{{ container }}">
       {% endif %}
       <div class="navbar-header">
@@ -90,7 +90,7 @@
           {{ page.navigation_collapsible }}
         </div>
       {% endif %}
-      {% if not navbar_attributes.hasClass('container') %}
+      {% if not navbar_attributes.hasClass(container) %}
         </div>
       {% endif %}
     </header>