diff --git a/libs/ardour/buffer_set.cc b/libs/ardour/buffer_set.cc
index 55356bdecb..046ea71de5 100644
--- a/libs/ardour/buffer_set.cc
+++ b/libs/ardour/buffer_set.cc
@@ -26,6 +26,7 @@
 #include <sstream>
 
 #include "pbd/compose.h"
+#include "pbd/failed_constructor.h"
 
 #include "ardour/buffer.h"
 #include "ardour/buffer_set.h"