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-rw-r--r--gtk2_ardour/mixer_ui.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index 3ceb44bde7..8534d40d32 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -60,6 +60,7 @@
#include "i18n.h"
using namespace ARDOUR;
+using namespace ARDOUR_UI_UTILS;
using namespace PBD;
using namespace Gtk;
using namespace Glib;