diff --git a/cinderclient/v1/client.py b/cinderclient/v1/client.py
index 19a017e..4998dcf 100644
--- a/cinderclient/v1/client.py
+++ b/cinderclient/v1/client.py
@@ -44,6 +44,8 @@ class Client(object):
 
     """
 
+    version = '1'
+
     def __init__(self, username=None, api_key=None, project_id=None,
                  auth_url='', insecure=False, timeout=None, tenant_id=None,
                  proxy_tenant_id=None, proxy_token=None, region_name=None,
diff --git a/cinderclient/v2/client.py b/cinderclient/v2/client.py
index 0d9abeb..cfcf69d 100644
--- a/cinderclient/v2/client.py
+++ b/cinderclient/v2/client.py
@@ -47,6 +47,8 @@ class Client(object):
         ...
     """
 
+    version = '2'
+
     def __init__(self, username=None, api_key=None, project_id=None,
                  auth_url='', insecure=False, timeout=None, tenant_id=None,
                  proxy_tenant_id=None, proxy_token=None, region_name=None,