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-rw-r--r--libs/ardour/ardour/midi_model.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libs/ardour/ardour/midi_model.h b/libs/ardour/ardour/midi_model.h
index b099f575a1..9961b51528 100644
--- a/libs/ardour/ardour/midi_model.h
+++ b/libs/ardour/ardour/midi_model.h
@@ -158,7 +158,7 @@ public:
XMLNode& get_state();
int set_state(const XMLNode&) { return 0; }
- sigc::signal<void> ContentsChanged;
+ boost::signals2::signal<void()> ContentsChanged;
const MidiSource* midi_source() const { return _midi_source; }
void set_midi_source(MidiSource* source) { _midi_source = source; }