diff --git a/nginx.conf b/nginx.conf
index 4f285f1..57f947c 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -35,7 +35,7 @@ server {
     }
 
     # Redirect unprefixed paths to /en/
-    location ~ ^/(?!en/|de/|fr/|css/|js/|img/|favicon|android|apple|site|llms|health|robots|index\.xml|[0-9a-f]{32}\.txt) {
+    location ~ "^/(?!en/|de/|fr/|css/|js/|img/|favicon|android|apple|site|llms|health|robots|index\.xml|[0-9a-f]{32}\.txt)" {
         return 302 /en$request_uri;
     }