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-rw-r--r--gtk2_ardour/ardour_dialog.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/ardour_dialog.cc b/gtk2_ardour/ardour_dialog.cc
index 5affa6e363..63c32e8c2d 100644
--- a/gtk2_ardour/ardour_dialog.cc
+++ b/gtk2_ardour/ardour_dialog.cc
@@ -32,6 +32,7 @@
using namespace std;
using namespace sigc;
using namespace Gtk;
+using namespace Gtkmm2ext;
sigc::signal<void> ArdourDialog::CloseAllDialogs;