diff --git a/pyghmi/ipmi/private/session.py b/pyghmi/ipmi/private/session.py
index d5256465..0ca2f573 100644
--- a/pyghmi/ipmi/private/session.py
+++ b/pyghmi/ipmi/private/session.py
@@ -447,6 +447,7 @@ class Session(object):
         self.integrityalgo = 0
         self.k1 = None
         self.rmcptag = 1
+        self.lastpayload = None
         self.ipmicallback = None
         self.sessioncontext = None
         self.sequencenumber = 0