diff --git a/_layouts/docs.html b/_layouts/docs.html
index 1845b13f56..69e49d78da 100644
--- a/_layouts/docs.html
+++ b/_layouts/docs.html
@@ -1,3 +1,4 @@
+<!-- {{ site.GH_ENV }} -->
 <!-- relative link basehrefs -->
 {% if page.path contains "index.md" %}
 {% capture basehref %}{{ page.url }}{% endcapture %}