diff --git a/agaric/templates/layout/page.html.twig b/agaric/templates/layout/page.html.twig
index 521910c..7de591e 100644
--- a/agaric/templates/layout/page.html.twig
+++ b/agaric/templates/layout/page.html.twig
@@ -45,7 +45,7 @@
 {% endif %}
 
 {% if node %}
-  {% set header_section_attributes = header_section_attributes.removeClass('hero', 'is-dark',b'hero-main', 'is-large').removeAttribute(['data-headerbg', 'style']) %}
+  {% set header_section_attributes = header_section_attributes.removeClass('hero', 'is-dark', 'hero-main', 'is-large').removeAttribute(['data-headerbg', 'style']) %}
 {% endif %}