diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index 0e23e9c917..80475a19c4 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -97,6 +97,7 @@
 #include "ardour/solo_isolate_control.h"
 #include "ardour/solo_safe_control.h"
 #include "ardour/stripable.h"
+#include "ardour/surround_return.h"
 #include "ardour/surround_send.h"
 #include "ardour/surround_pannable.h"
 #include "ardour/track.h"