1 files changed, 4 insertions, 2 deletions
diff --git a/libs/ardour/ardour/worker.h b/libs/ardour/ardour/worker.h
index 4f3ff54bc1..c9ff2f2d7f 100644
--- a/libs/ardour/ardour/worker.h
+++ b/libs/ardour/ardour/worker.h
@@ -27,12 +27,14 @@
 #include "pbd/ringbuffer.h"
 #include "pbd/semaphore.h"
 
+#include "ardour/libardour_visibility.h"
+
 namespace ARDOUR {
 
 /**
    An object that needs to schedule non-RT work in the audio thread.
 */
-class Workee {
+class LIBARDOUR_API Workee {
 public:
 	virtual ~Workee() {}
 
@@ -50,7 +52,7 @@ public:
 /**
    A worker thread for non-realtime tasks scheduled in the audio thread.
 */
-class Worker
+class LIBARDOUR_API Worker
 {
 public:
 	Worker(Workee* workee, uint32_t ring_size);