diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index fab877cf0b..47f39d96b7 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -574,6 +574,7 @@ Session::when_engine_running ()
 
 	BootMessage (_("Connect to engine"));
 	_engine.set_session (this);
+	_engine.reset_timebase ();
 }
 
 void