diff --git a/libs/ardour/graph.cc b/libs/ardour/graph.cc
index bf7c41e437..d379cd297c 100644
--- a/libs/ardour/graph.cc
+++ b/libs/ardour/graph.cc
@@ -531,6 +531,7 @@ Graph::main_thread ()
 	resume_rt_malloc_checks ();
 
 	pt->get_buffers ();
+	Temporal::TempoMap::fetch ();
 
 	/* Wait for initial process callback */
 again: