diff --git a/libs/ardour/globals.cc b/libs/ardour/globals.cc
index 5d189b97fe..194b3349b8 100644
--- a/libs/ardour/globals.cc
+++ b/libs/ardour/globals.cc
@@ -84,6 +84,7 @@
 #include <lrdf.h>
 #endif
 
+#include "pbd/base_ui.h"
 #include "pbd/cpus.h"
 #include "pbd/enumwriter.h"
 #include "pbd/error.h"
@@ -656,6 +657,8 @@ ARDOUR::init_post_engine (uint32_t start_cnt)
 		}
 	}
 
+	BaseUI::set_thread_priority (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority () - 3));
+
 	TransportMasterManager::instance ().restart ();
 }
 
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 5c8f6c1d8d..60d4583c73 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -47,7 +47,6 @@
 #include <boost/algorithm/string/erase.hpp>
 
 #include "pbd/basename.h"
-#include "pbd/base_ui.h"
 #include "pbd/convert.h"
 #include "pbd/error.h"
 #include "pbd/file_utils.h"
@@ -543,8 +542,6 @@ Session::immediately_post_engine ()
 		_process_graph.reset (new Graph (*this));
 	}
 
-	BaseUI::set_thread_priority (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority () - 3));
-
 	/* every time we reconnect, recompute worst case output latencies */
 
 	_engine.Running.connect_same_thread (*this, boost::bind (&Session::initialize_latencies, this));