diff --git a/senlin/common/exception.py b/senlin/common/exception.py
index 5d6bcef69..ec6a08b61 100644
--- a/senlin/common/exception.py
+++ b/senlin/common/exception.py
@@ -270,6 +270,14 @@ class RequestLimitExceeded(SenlinException):
     msg_fmt = _('Request limit exceeded: %(message)s')
 
 
+class ActionMissingTarget(SenlinException):
+    msg_fmt = _('Action "%(action)s" must have target specified')
+
+
+class ActionMissingPolicy(SenlinException):
+    msg_fmt = _('Action "%(action)s" must have policy specified')
+
+
 class ActionNotSupported(SenlinException):
     msg_fmt = _('Action "%(action)s" not supported by %(object)s')