diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index 9e228b3684..d561d109a1 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -2592,6 +2592,9 @@ Session::XMLRouteFactory_3X (const XMLNode& node, int version)
 
 		if (r->init () == 0 && r->set_state (node, version) == 0) {
 			BOOST_MARK_ROUTE (r);
+			if (!r->is_singleton ()) {
+				r->add_internal_return ();
+			}
 			ret = r;
 		}
 	}
@@ -2665,6 +2668,9 @@ Session::XMLRouteFactory_2X (const XMLNode& node, int version)
 
 		if (r->init () == 0 && r->set_state (node, version) == 0) {
 			BOOST_MARK_ROUTE (r);
+			if (!r->is_singleton ()) {
+				r->add_internal_return ();
+			}
 			ret = r;
 		}
 	}