diff --git a/sdrbase/feature/feature.h b/sdrbase/feature/feature.h
index 06e8a08f2..939ccd9f7 100644
--- a/sdrbase/feature/feature.h
+++ b/sdrbase/feature/feature.h
@@ -43,7 +43,7 @@ namespace SWGSDRangel
 class SDRBASE_API Feature : public QObject {
     Q_OBJECT
 public:
-    class MsgChannelSettings : public Message {
+    class SDRBASE_API MsgChannelSettings : public Message {
         MESSAGE_CLASS_DECLARATION
 
     public: