diff --git a/libs/ardour/ardour/butler.h b/libs/ardour/ardour/butler.h
index 94b6fb876b..7f0847498e 100644
--- a/libs/ardour/ardour/butler.h
+++ b/libs/ardour/ardour/butler.h
@@ -61,6 +61,8 @@ class LIBARDOUR_API Butler : public SessionHandleRef
 	bool transport_work_requested() const;
 	void drop_references ();
 
+        void map_parameters ();
+
 	framecnt_t audio_diskstream_capture_buffer_size() const { return audio_dstream_capture_buffer_size; }
 	framecnt_t audio_diskstream_playback_buffer_size() const { return audio_dstream_playback_buffer_size; }
 	uint32_t midi_diskstream_buffer_size()  const { return midi_dstream_buffer_size; }
diff --git a/libs/ardour/butler.cc b/libs/ardour/butler.cc
index 2485bc399f..67d7dd1617 100644
--- a/libs/ardour/butler.cc
+++ b/libs/ardour/butler.cc
@@ -54,13 +54,8 @@ Butler::Butler(Session& s)
 	g_atomic_int_set(&should_do_transport_work, 0);
 	SessionEvent::pool->set_trash (&pool_trash);
 
-	/* catch future changes to parameters */
-	Config->ParameterChanged.connect_same_thread (*this, boost::bind (&Butler::config_changed, this, _1));
-
-	/* use any current ones that we care about */
-	boost::function<void (std::string)> ff (boost::bind (&Butler::config_changed, this, _1));
-	Config->map_parameters (ff);
-	
+        /* catch future changes to parameters */
+        Config->ParameterChanged.connect_same_thread (*this, boost::bind (&Butler::config_changed, this, _1));
 }
 
 Butler::~Butler()
@@ -68,6 +63,14 @@ Butler::~Butler()
 	terminate_thread ();
 }
 
+void
+Butler::map_parameters ()
+{
+        /* use any current ones that we care about */
+        boost::function<void (std::string)> ff (boost::bind (&Butler::config_changed, this, _1));
+        Config->map_parameters (ff);
+}
+
 void
 Butler::config_changed (std::string p)
 {
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index ce0d006a9e..ba904d24c9 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -271,6 +271,7 @@ Session::post_engine_init ()
 		
 		Config->map_parameters (ff);
 		config.map_parameters (ft);
+                _butler->map_parameters ();
 
 		/* Reset all panners */