diff --git a/src/kernel/ntqsound.h b/src/kernel/ntqsound.h
index 36e84b5c..c7998f34 100644
--- a/src/kernel/ntqsound.h
+++ b/src/kernel/ntqsound.h
@@ -96,7 +96,7 @@ private:
   TQAuBucket is whatever you want.
 */
 
-class TQAuBucket {
+class Q_EXPORT TQAuBucket {
 public:
     virtual ~TQAuBucket();
 };