diff --git a/modules/web/fsrewsp.nix b/modules/web/fsrewsp.nix
index 57ad6bb..f8f0799 100644
--- a/modules/web/fsrewsp.nix
+++ b/modules/web/fsrewsp.nix
@@ -43,6 +43,7 @@ in
       root = "/srv/web/fsrewsp";
       extraConfig = ''
         index index.php index.html;
+        fastcgi_param HTTP_HOST $host;
       '';
 
       locations = {
diff --git a/modules/web/nightline.nix b/modules/web/nightline.nix
index 9cff390..0e264a4 100644
--- a/modules/web/nightline.nix
+++ b/modules/web/nightline.nix
@@ -40,6 +40,7 @@ in
       root = "/srv/web/nightline";
       extraConfig = ''
         index index.php index.html;
+        fastcgi_param HTTP_HOST $host;
       '';
 
       locations = {