diff --git a/owncloud/nginx.conf b/owncloud/nginx.conf
index 0146dae..aa701ea 100644
--- a/owncloud/nginx.conf
+++ b/owncloud/nginx.conf
@@ -61,7 +61,7 @@ http {
         error_page 403 /core/templates/403.php;
         error_page 404 /core/templates/404.php;
         
-        add_header Strict-Transport-Security "max-age=15768000; includeSubdomains; preload;";
+        add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
         add_header X-Frame-Options SAMEORIGIN;
         add_header X-Content-Type-Options nosniff;
         add_header X-XSS-Protection "1; mode=block";