diff --git a/Apache/SOGo.conf b/Apache/SOGo.conf
index f61df7946..8056bd7db 100644
--- a/Apache/SOGo.conf
+++ b/Apache/SOGo.conf
@@ -75,6 +75,7 @@ ProxyPass /SOGo http://127.0.0.1:20000/SOGo retry=0
 ## and do not forget to enable the headers module
 <IfModule headers_module>
   RequestHeader set "x-webobjects-server-port" "443"
+  SetEnvIf Host (.*) HTTP_HOST=$1
   RequestHeader set "x-webobjects-server-name" "%{HTTP_HOST}e" env=HTTP_HOST
   RequestHeader set "x-webobjects-server-url" "https://%{HTTP_HOST}e" env=HTTP_HOST