diff --git a/compose.yml b/compose.yml
index 9c33e41..4645eb2 100644
--- a/compose.yml
+++ b/compose.yml
@@ -39,6 +39,7 @@ services:
       - PEERTUBE_CONTACT_FORM_ENABLED
       - PEERTUBE_DB_HOSTNAME=db
       - PEERTUBE_DB_PASSWORD_FILE=/run/secrets/db_password
+      - PEERTUBE_DB_PORT=5432
       - PEERTUBE_DB_USERNAME=peertube
       - PEERTUBE_REDIS_HOSTNAME=cache
       - PEERTUBE_SIGNUP_ENABLED