diff --git a/templates/nagios/cgi_cfg.erb b/templates/nagios/cgi_cfg.erb
index cf7d6d4..6b7c78f 100644
--- a/templates/nagios/cgi_cfg.erb
+++ b/templates/nagios/cgi_cfg.erb
@@ -30,15 +30,13 @@ authorized_for_all_hosts=<%= @ng_main_user %>,<%= @ng_hostview_auth %>
 authorized_for_all_service_commands=<%= @ng_main_user %>,<%= @ng_svc_cmd_auth %>
 authorized_for_all_host_commands=<%= @ng_main_user %>,<%= @ng_host_cmd_auth %>
 
-<% unless @ng_readonly_auth.undef? -%>
+<% unless @ng_readonly_auth.nil? -%>
 authorized_for_read_only=<%= @ng_readonly_auth %>
 <% end -%>
-<% unless @ng_statusmap_img.undef? -%>
+<% unless @ng_statusmap_img.nil? -%>
 statusmap_background_image=<%= @ng_statusmap_img %>
 <% end -%>
 
-
-
 <% if @ng_use_colormap == true -%>
 color_transparency_index_r=<%= @ng_colormap_red %>
 color_transparency_index_g=<%= @ng_colormap_green %>