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-rw-r--r--libs/ardour/ardour/midi_state_tracker.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/libs/ardour/ardour/midi_state_tracker.h b/libs/ardour/ardour/midi_state_tracker.h
index 24d3ab73a1..046e77f38c 100644
--- a/libs/ardour/ardour/midi_state_tracker.h
+++ b/libs/ardour/ardour/midi_state_tracker.h
@@ -27,12 +27,13 @@ template <typename T> class EventSink;
}
namespace ARDOUR {
+
class MidiSource;
/** Tracks played notes, so they can be resolved in potential stuck note
* situations (e.g. looping, transport stop, etc).
*/
-class MidiStateTracker
+class LIBARDOUR_API MidiStateTracker
{
public:
MidiStateTracker();