1 files changed, 1 insertions, 1 deletions
diff --git a/muse2/muse/midievent.h b/muse2/muse/midievent.h
index a63fede2..30f0d84f 100644
--- a/muse2/muse/midievent.h
+++ b/muse2/muse/midievent.h
@@ -36,7 +36,7 @@ class MidiEventBase : public EventBase {
       int a, b, c;                  // pitch, velo-on, velo-off
       EvData edata;
 
-      virtual EventBase* clone() { return new MidiEventBase(*this); }
+      virtual EventBase* clone() const { return new MidiEventBase(*this); }
 
    public:
       MidiEventBase(EventType t);