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-rw-r--r--gtk2_ardour/route_ui.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/route_ui.cc b/gtk2_ardour/route_ui.cc
index bd2cee26e9..4559058b8d 100644
--- a/gtk2_ardour/route_ui.cc
+++ b/gtk2_ardour/route_ui.cc
@@ -41,6 +41,7 @@ using namespace sigc;
using namespace Gtk;
using namespace Gtkmm2ext;
using namespace ARDOUR;
+using namespace PBD;
RouteUI::RouteUI (ARDOUR::Route& rt, ARDOUR::Session& sess, const char* m_name,