diff --git a/templates/neutronapi/httpd/10-neutron-httpd.conf b/templates/neutronapi/httpd/10-neutron-httpd.conf
index c74511f6..fd73382c 100644
--- a/templates/neutronapi/httpd/10-neutron-httpd.conf
+++ b/templates/neutronapi/httpd/10-neutron-httpd.conf
@@ -13,9 +13,9 @@
   ## Request header rules
   ## as per http://httpd.apache.org/docs/2.2/mod/mod_headers.html#requestheader
 {{- if $vhost.TLS }}
-  RequestHeader set X-Forwarded-Proto "https"
+  RequestHeader setIfEmpty X-Forwarded-Proto "https"
 {{- else }}
-  RequestHeader set X-Forwarded-Proto "http"
+  RequestHeader setIfEmpty X-Forwarded-Proto "http"
 {{- end }}
 
   ## Proxy rules