diff --git a/register_ovh_account b/register_ovh_account
index b017b64..ce1f344 100755
--- a/register_ovh_account
+++ b/register_ovh_account
@@ -1,8 +1,13 @@
 #!/usr/bin/python3
 
+import sys
 from ovh import ovh
 
-domain = 'example.com'
+if len(sys.argv) != 2:
+    print('usage: {} <domain>'.format(sys.argv[0]))
+    sys.exit(1)
+
+domain = sys.argv[1]
 
 client = ovh.Client()