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-rw-r--r--gtk2_ardour/automation_line.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/automation_line.cc b/gtk2_ardour/automation_line.cc
index 70bc676fca..b87a71ca87 100644
--- a/gtk2_ardour/automation_line.cc
+++ b/gtk2_ardour/automation_line.cc
@@ -48,6 +48,7 @@
using namespace std;
using namespace sigc;
using namespace ARDOUR;
+using namespace PBD;
using namespace Editing;
using namespace Gnome; // for Canvas