1 files changed, 3 insertions, 1 deletions
diff --git a/libs/ardour/ardour/speaker.h b/libs/ardour/ardour/speaker.h
index 3deeb8b0d9..c643eb5d02 100644
--- a/libs/ardour/ardour/speaker.h
+++ b/libs/ardour/ardour/speaker.h
@@ -22,9 +22,11 @@
 #include "pbd/cartesian.h"
 #include "pbd/signals.h"
 
+#include "ardour/libardour_visibility.h"
+
 namespace ARDOUR {
 
-class Speaker {
+class LIBARDOUR_API Speaker {
 public:
 	Speaker (int, const PBD::AngularVector& position);
 	Speaker (const Speaker &);