diff --git a/libs/ardour/ardour/midi_buffer.h b/libs/ardour/ardour/midi_buffer.h
index 10105cfbb3..f1f8d678b9 100644
--- a/libs/ardour/ardour/midi_buffer.h
+++ b/libs/ardour/ardour/midi_buffer.h
@@ -124,7 +124,7 @@ public:
 
 		size_t total_data_deleted = sizeof(TimeType) + event_size;
 
-		if (i.offset + total_data_deleted >= _size) {
+		if (i.offset + total_data_deleted > _size) {
 			_size = 0;
 			return end();
 		}