diff --git a/templates/pip.conf.erb b/templates/pip.conf.erb
index c0b957d..caf7976 100644
--- a/templates/pip.conf.erb
+++ b/templates/pip.conf.erb
@@ -1,6 +1,6 @@
 [global]
 index-url = <%= @index_url %>
-<% if trusted_hosts.length > 0 -%>
+<% if @trusted_hosts.length > 0 -%>
 trusted-host =
 <% @trusted_hosts.each do |trusted_host| -%>
   <%= trusted_host %>