diff --git a/trove/guestagent/datastore/experimental/couchdb/manager.py b/trove/guestagent/datastore/experimental/couchdb/manager.py
index b1030ec6a2..5fe6ba492a 100644
--- a/trove/guestagent/datastore/experimental/couchdb/manager.py
+++ b/trove/guestagent/datastore/experimental/couchdb/manager.py
@@ -42,7 +42,7 @@ class Manager(periodic_task.PeriodicTasks):
     def prepare(self, context, packages, databases, memory_mb, users,
                 device_path=None, mount_point=None, backup_info=None,
                 config_contents=None, root_password=None, overrides=None,
-                cluster_config=None):
+                cluster_config=None, snapshot=None):
         """
         This is called when the Trove instance first comes online.
         It is the first RPC  message passed from the task manager.
diff --git a/trove/guestagent/datastore/experimental/vertica/manager.py b/trove/guestagent/datastore/experimental/vertica/manager.py
index 4e02770d71..933acb45cf 100644
--- a/trove/guestagent/datastore/experimental/vertica/manager.py
+++ b/trove/guestagent/datastore/experimental/vertica/manager.py
@@ -43,7 +43,8 @@ class Manager(periodic_task.PeriodicTasks):
     def prepare(self, context, packages, databases, memory_mb, users,
                 device_path=None, mount_point=None, backup_info=None,
                 config_contents=None, root_password=None, overrides=None,
-                cluster_config=None, path_exists_function=os.path.exists):
+                cluster_config=None,
+                snapshot=None, path_exists_function=os.path.exists):
         """Makes ready DBAAS on a Guest container."""
         try:
             LOG.info(_("Setting instance status to BUILDING."))