diff --git a/etcd3gw/client.py b/etcd3gw/client.py
index 7313783..9f2901a 100644
--- a/etcd3gw/client.py
+++ b/etcd3gw/client.py
@@ -83,7 +83,7 @@ def post(self, *args, **kwargs):
             if resp.status_code in _EXCEPTIONS_BY_CODE:
                 raise _EXCEPTIONS_BY_CODE[resp.status_code](resp.reason)
             if resp.status_code != requests.codes['ok']:
-                raise exceptions.Etcd3Exception(resp.reason, resp.text)
+                raise exceptions.Etcd3Exception(resp.text, resp.reason)
         except requests.exceptions.Timeout as ex:
             raise exceptions.ConnectionTimeoutError(six.text_type(ex))
         except requests.exceptions.ConnectionError as ex:
diff --git a/etcd3gw/exceptions.py b/etcd3gw/exceptions.py
index 00ac8f5..cd9134a 100644
--- a/etcd3gw/exceptions.py
+++ b/etcd3gw/exceptions.py
@@ -12,8 +12,8 @@
 
 
 class Etcd3Exception(Exception):
-    def __init__(self, msg, detail_text=None):
-        super(Etcd3Exception, self).__init__(msg)
+    def __init__(self, detail_text=None, *args):
+        super(Etcd3Exception, self).__init__(*args)
         self.detail_text = detail_text