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-rw-r--r--gtk2_ardour/mono_panner.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/mono_panner.cc b/gtk2_ardour/mono_panner.cc
index c9f46e12b8..fad2c09b64 100644
--- a/gtk2_ardour/mono_panner.cc
+++ b/gtk2_ardour/mono_panner.cc
@@ -50,6 +50,7 @@
using namespace std;
using namespace Gtk;
using namespace Gtkmm2ext;
+using namespace ARDOUR_UI_UTILS;
static const int pos_box_size = 9;
static const int lr_box_size = 15;