diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index f7f8516ef3..81529652b3 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -716,6 +716,8 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
 		return _current_trans_quarks;
 	}
 
+	bool operation_in_progress (GQuark) const;
+
 	void add_commands (std::vector<Command*> const & cmds);
 
 	std::map<PBD::ID,PBD::StatefulDestructible*> registry;
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index f78a26cc05..9e46f38f6a 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -4758,3 +4758,9 @@ Session::next_control_id () const
 {
 	return ntracks() + nbusses() + 1;
 }
+
+bool
+Session::operation_in_progress (GQuark op) const
+{
+	return (find (_current_trans_quarks.begin(), _current_trans_quarks.end(), op) != _current_trans_quarks.end());
+}