diff --git a/robottelo/hosts.py b/robottelo/hosts.py
index f5b210efa85..a401452fff7 100644
--- a/robottelo/hosts.py
+++ b/robottelo/hosts.py
@@ -743,7 +743,7 @@ def register(
             raise ValueError('Global registration method can be used with Satellite/Capsule only')
 
         if lifecycle_environment is not None:
-            options['lifecycle_environment_id'] = lifecycle_environment.id
+            options['lifecycle-environment-id'] = lifecycle_environment.id
         if operating_system is not None:
             options['operatingsystem-id'] = operating_system.id
         if hostgroup is not None: