diff --git a/novaclient/exceptions.py b/novaclient/exceptions.py
index b331c3c01..afea93326 100644
--- a/novaclient/exceptions.py
+++ b/novaclient/exceptions.py
@@ -116,6 +116,22 @@ class NotFound(ClientException):
     message = "Not found"
 
 
+class MethodNotAllowed(ClientException):
+    """
+    HTTP 405 - Method Not Allowed
+    """
+    http_status = 405
+    message = "Method Not Allowed"
+
+
+class Conflict(ClientException):
+    """
+    HTTP 409 - Conflict
+    """
+    http_status = 409
+    message = "Conflict"
+
+
 class OverLimit(ClientException):
     """
     HTTP 413 - Over limit: you're over the API limits for this time period.
@@ -147,8 +163,9 @@ class HTTPNotImplemented(ClientException):
 #                      for c in ClientException.__subclasses__())
 #
 # Instead, we have to hardcode it:
-_code_map = dict((c.http_status, c) for c in [BadRequest, Unauthorized,
-                   Forbidden, NotFound, OverLimit, HTTPNotImplemented])
+_error_classes = [BadRequest, Unauthorized, Forbidden, NotFound,
+                  MethodNotAllowed, Conflict, OverLimit, HTTPNotImplemented]
+_code_map = dict((c.http_status, c) for c in _error_classes)
 
 
 def from_response(response, body, url, method=None):