diff --git a/docker-compose.files.yml b/docker-compose.files.yml
index aa4b85e..29a858d 100644
--- a/docker-compose.files.yml
+++ b/docker-compose.files.yml
@@ -4,4 +4,4 @@
 services:
   app:
     ports:
-      - "${RUSTPAD_FILES_PORT:-3001}:${FILES_PORT:-3001}"
+      - "${RUSTPAD_FILES_PORT:-${FILES_PORT:-3001}}:${FILES_PORT:-3001}"