diff --git a/templates/krb5.conf.erb b/templates/krb5.conf.erb
index 7a9eb7a..4833d2d 100644
--- a/templates/krb5.conf.erb
+++ b/templates/krb5.conf.erb
@@ -123,7 +123,7 @@
 <% @kdcs.each do |kdc| -%>
         kdc = <%= kdc %>
 <% end -%>
-        admin_server = <%= admin_server %>
+        admin_server = <%= @admin_server %>
         default_domain = <%= @realm.downcase %>
     }