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-rw-r--r--gtk2_ardour/midi_region_view.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/midi_region_view.cc b/gtk2_ardour/midi_region_view.cc
index 77ba80b077..2644be763a 100644
--- a/gtk2_ardour/midi_region_view.cc
+++ b/gtk2_ardour/midi_region_view.cc
@@ -37,6 +37,7 @@
#include "ardour/midi_diskstream.h"
#include "ardour/midi_model.h"
#include "ardour/midi_patch_manager.h"
+#include "ardour/session.h"
#include "evoral/Parameter.hpp"
#include "evoral/Control.hpp"