diff --git a/Pubnub.py b/Pubnub.py
index c2d3bd40..bf8463ac 100644
--- a/Pubnub.py
+++ b/Pubnub.py
@@ -906,7 +906,7 @@ def history(self, channel, count=100, reverse=False,
         params['reverse'] = reverse
         params['start'] = start
         params['end'] = end
-        params['auth_key'] = self.auth_key
+        params['auth'] = self.auth_key
         params['pnsdk'] = self.pnsdk
 
         ## Get History