diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e2956f7851f543dfa055197accc1744b1890b762..7cb2fc7624e4b98806ffaf3352929fd7a6a9e7f9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -308,7 +308,9 @@ deploy_login_node:
       export cmd="openstack server create"
       cmd+=" -c id -f value --image $LOGIN_IMAGE_ID"
       cmd+=" --flavor $INSTANCE_FLAVOR"
+      if [ -n "$INSTANCE_NETWORK" ];then
       cmd+=" --network $INSTANCE_NETWORK"
+      fi
       cmd+=" --security-group allow-ssh"
       cmd+=" --user-data user_data.txt"
       if [ -n "$LOGIN_PORT" ];then cmd+=" --port $LOGIN_PORT"; fi