diff --git a/libs/ardour/ardour/beatbox.h b/libs/ardour/ardour/beatbox.h
index a9e57dd8af..933c2f280e 100644
--- a/libs/ardour/ardour/beatbox.h
+++ b/libs/ardour/ardour/beatbox.h
@@ -30,7 +30,7 @@
 #include "pbd/ringbuffer.h"
 
 #include "temporal/bbt_time.h"
-#include "temporal/superclock.h
+#include "temporal/superclock.h"
 
 #include "ardour/midi_state_tracker.h"
 #include "ardour/processor.h"