diff --git a/frontend/nginx.conf b/frontend/nginx.conf
index 504c797..0783a06 100644
--- a/frontend/nginx.conf
+++ b/frontend/nginx.conf
@@ -11,8 +11,14 @@ server {
   resolver 127.0.0.11 valid=30s;
 
   location /api/ {
-    set $backend_upstream http://presencia-backend:4790;
-    proxy_pass $backend_upstream/api/;
+    set $backend_upstream presencia-backend;
+    # $request_uri (the raw, un-normalized original URI) must be appended
+    # explicitly: when the proxy_pass target is built from a variable,
+    # nginx does NOT replace the matched location prefix with the rest of
+    # the request URI like it does for a static proxy_pass value — it
+    # would otherwise always forward the literal "/api/" with nothing
+    # appended, regardless of the actual path requested.
+    proxy_pass http://$backend_upstream:4790$request_uri;
     proxy_http_version 1.1;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;