diff --git a/docs/apache2.conf b/docs/apache2.conf
index 9718504..f43a565 100644
--- a/docs/apache2.conf
+++ b/docs/apache2.conf
@@ -12,9 +12,11 @@
         SSLCertificateFile     /etc/ssl/certs/ssl-cert-snakeoil.pem
         SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key
 
-        # Tell tusd that the HTTPS protocol is used, in order to
-        # allow constructing correct upload URLs.
+        # In order that tusd can construct correct upload URLs, we tell tusd
+        # that the HTTPS protocol is used and also forward the original Host
+        # Header.
         RequestHeader set X-Forwarded-Proto "https"
+        ProxyPreserveHost on
 
         # Pass requests to tusd server
         ProxyPass /files http://localhost:1080/files