diff --git a/scripts/docs/templates/api_menu_flat_version.template.html b/scripts/docs/templates/api_menu_flat_version.template.html
index c15e86a505..099e619019 100644
--- a/scripts/docs/templates/api_menu_flat_version.template.html
+++ b/scripts/docs/templates/api_menu_flat_version.template.html
@@ -1,4 +1,4 @@
 <@ for doc in docs @><@ if doc.URL and doc.private != true and doc.name @>
-<li class="capitalize {% if page.id == '<$ doc.name|lower|replace(' ','-') %}active{% endif %}">
+<li class="capitalize {% if page.id == '<$ doc.name|lower|replace(' ','-')$>' %}active{% endif %}">
   <a href="/<$ doc.URL|replace('// ','/') $>"><$ doc.name $></a>
 </li><@ endif @><@ endfor @>