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-rw-r--r--libs/pbd/pbd/semutils.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/libs/pbd/pbd/semutils.h b/libs/pbd/pbd/semutils.h
index af5c201b85..5c0191e25b 100644
--- a/libs/pbd/pbd/semutils.h
+++ b/libs/pbd/pbd/semutils.h
@@ -25,9 +25,11 @@
#include <semaphore.h>
#endif
+#include "pbd/libpbd_visibility.h"
+
namespace PBD {
-class ProcessSemaphore {
+class LIBPBD_API ProcessSemaphore {
private:
#ifdef PLATFORM_WINDOWS
HANDLE _sem;