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-rw-r--r--gtk2_ardour/tempo_dialog.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/tempo_dialog.cc b/gtk2_ardour/tempo_dialog.cc
index 9f5fbda13f..7eb0362580 100644
--- a/gtk2_ardour/tempo_dialog.cc
+++ b/gtk2_ardour/tempo_dialog.cc
@@ -11,6 +11,7 @@
using namespace Gtk;
using namespace Gtkmm2ext;
using namespace ARDOUR;
+using namespace PBD;
TempoDialog::TempoDialog (TempoMap& map, jack_nframes_t frame, const string & action)
: ArdourDialog ("tempo dialog"),