diff --git a/libs/evoral/src/libsmf/smf.c b/libs/evoral/src/libsmf/smf.c
index 7b623210e9..67cc7b889e 100644
--- a/libs/evoral/src/libsmf/smf.c
+++ b/libs/evoral/src/libsmf/smf.c
@@ -136,7 +136,7 @@ smf_track_delete(smf_track_t *track)
 	/* Remove all the events */
 	unsigned int i;
 	for (i = 0; i < track->events_array->len; ++i) {
-		smf_event_t* ev = g_ptr_array_index(track->events_array, i);
+		smf_event_t* ev = (smf_event_t*)g_ptr_array_index(track->events_array, i);
 		free (ev->midi_buffer);
 		free (ev);
 	}