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-rw-r--r--gtk2_ardour/route_params_ui.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/route_params_ui.cc b/gtk2_ardour/route_params_ui.cc
index 7b6f00d76b..d6ec7eab6c 100644
--- a/gtk2_ardour/route_params_ui.cc
+++ b/gtk2_ardour/route_params_ui.cc
@@ -52,6 +52,7 @@
#include "i18n.h"
using namespace ARDOUR;
+using namespace PBD;
using namespace Gtk;
using namespace sigc;