diff --git a/stack.sh b/stack.sh
index 80605de..ce8ee9e 100755
--- a/stack.sh
+++ b/stack.sh
@@ -632,6 +632,7 @@ add_nova_flag "--rabbit_password=$RABBIT_PASSWORD"
 add_nova_flag "--glance_api_servers=$GLANCE_HOSTPORT"
 if [ -n "$INSTANCES_PATH" ]; then
     add_nova_flag "--instances_path=$INSTANCES_PATH"
+fi
 if [ -n "$MULTI_HOST" ]; then
     add_nova_flag "--multi_host=$MULTI_HOST"
     add_nova_flag "--send_arp_for_ha=1"