diff --git a/jenkins.sh b/jenkins.sh
index 5c6eff7..3b6fb1f 100755
--- a/jenkins.sh
+++ b/jenkins.sh
@@ -3,7 +3,7 @@
 set -e
 
 make clean
-rm olm-*.tgz
+rm -f olm-*.tgz
 
 make lib
 make test
diff --git a/python/olm/__main__.py b/python/olm/__main__.py
index a34d52a..e06f267 100755
--- a/python/olm/__main__.py
+++ b/python/olm/__main__.py
@@ -327,7 +327,7 @@ def do_inbound_group(args):
             sys.exit(1);
 
     session = InboundGroupSession()
-    session.init(credentials['message_index'], credentials['session_key'])
+    session.init(credentials['session_key'])
     with open(args.session_file, "wb") as f:
         f.write(session.pickle(args.key))