diff --git a/postgres/rootfs/docker-entrypoint-initdb.d/10-vector.sh b/postgres/rootfs/docker-entrypoint-initdb.d/10-vector.sh
index 984fcc3db..c97f4fe61 100755
--- a/postgres/rootfs/docker-entrypoint-initdb.d/10-vector.sh
+++ b/postgres/rootfs/docker-entrypoint-initdb.d/10-vector.sh
@@ -13,7 +13,7 @@ bashio::log.info "Enabling vector.rs"
 DB_PORT=5432
 DB_HOSTNAME=localhost
 DB_PASSWORD="$(bashio::config 'POSTGRES_PASSWORD')"
-if bashio::config.has_value "DB_USERNAME"; then DB_USERNAME="$(bashio::config "DB_USERNAME")"; else DB_USERNAME=postgres; fi
+if bashio::config.has_value "POSTGRES_USER"; then DB_USERNAME="$(bashio::config "POSTGRES_USER")"; else DB_USERNAME=postgres; fi
 
 export DB_PORT
 export DB_HOSTNAME