diff --git a/volumes/conf.d/code.zinomedia.de.conf b/volumes/conf.d/code.zinomedia.de.conf
index f7b530b..b622392 100644
--- a/volumes/conf.d/code.zinomedia.de.conf
+++ b/volumes/conf.d/code.zinomedia.de.conf
@@ -29,7 +29,7 @@ server {
         # forward the /validate request to Vouch Proxy
         #proxy_pass http://vouch:9090/validate;
 
-        if (true) {
+        if ($http_host = $http_host) {
             proxy_pass http://vouch:9090/validate;
         }