diff --git a/src/tripleo_aio_helpers/create_aio_vm.py b/src/tripleo_aio_helpers/create_aio_vm.py
index 6039231..70460b5 100644
--- a/src/tripleo_aio_helpers/create_aio_vm.py
+++ b/src/tripleo_aio_helpers/create_aio_vm.py
@@ -93,9 +93,9 @@ def parse_args():
 def write_user_data(data):
     """Write out a temporary user data file"""
 
-    data.boot_cmd=""
+    data.bootcmd=""
     if data.cidr_1:
-        data.boot_cmd = (
+        data.bootcmd = (
             "bootcmd:\n"
             f'  - "nmcli con modify \'System eth0\' ipv4.address {data.cidr_1} ipv4.method static ipv4.gateway {data.gateway} ipv4.dns {data.dns}"\n'
             f'  - "nmcli con modify \'Wired connection 1\' ipv4.address {data.cidr_2} ipv4.method static ipv4.gateway {data.gateway} ipv4.dns {data.dns}"\n'