diff --git a/docker/docker-entrypoint.sh b/docker/docker-entrypoint.sh
index 4832675ab..13a0ba035 100644
--- a/docker/docker-entrypoint.sh
+++ b/docker/docker-entrypoint.sh
@@ -25,6 +25,11 @@ wait_for_postgres() {
 	host="${PAPERLESS_DBHOST}"
 	port="${PAPERLESS_DBPORT}"
 
+	if [[ -z $port ]] ;
+	then
+		port="5432"
+	fi
+
 	while !</dev/tcp/$host/$port ;
 	do