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-rw-r--r--gtk2_ardour/editor_mouse.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/editor_mouse.cc b/gtk2_ardour/editor_mouse.cc
index c140213bb2..6c2919f5dd 100644
--- a/gtk2_ardour/editor_mouse.cc
+++ b/gtk2_ardour/editor_mouse.cc
@@ -61,6 +61,7 @@
using namespace std;
using namespace ARDOUR;
+using namespace PBD;
using namespace sigc;
using namespace Gtk;
using namespace Editing;