diff --git a/borg.backup.zabbix.sh b/borg.backup.zabbix.sh
index 1d4718c..0d0a53a 100755
--- a/borg.backup.zabbix.sh
+++ b/borg.backup.zabbix.sh
@@ -37,6 +37,7 @@ fi;
 if [ "${ZABBIX_DATABASE}" = "psql" ]; then
 	OPT_ZABBIX_DUMP="-C";
 fi;
+ZABBIX_DB_PORT="";
 if [ -n "${ZABBIX_DB_PORT}" ]; then
 	ZABBIX_DB_PORT="-P 5432";
 fi;