diff --git a/docs/_theme/main.html b/docs/_theme/main.html
index 3ff44b9cb..4dfc4e14e 100644
--- a/docs/_theme/main.html
+++ b/docs/_theme/main.html
@@ -2,8 +2,8 @@
 
 {% block site_meta %}
   {{ super() }}
-  {# Disable search indexing unless we're building for ReadTheDocs (see #10496) #}
-  {% if page.canonical_url != 'https://docs.netbox.dev/' %}
+  {# Disable search indexing unless we're building for ReadTheDocs #}
+  {% if not config.extra.readthedocs %}
     <meta name="robots" content="noindex">
   {% endif %}
 {% endblock %}
diff --git a/mkdocs.yml b/mkdocs.yml
index c04ef519f..5aa657230 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -42,6 +42,7 @@ plugins:
             show_root_toc_entry: false
             show_source: false
 extra:
+  readthedocs: !ENV READTHEDOCS
   social:
     - icon: fontawesome/brands/github
       link: https://github.com/netbox-community/netbox