diff --git a/include/wx/sound.h b/include/wx/sound.h
index 3e470dd11b..0ceba36240 100644
--- a/include/wx/sound.h
+++ b/include/wx/sound.h
@@ -43,7 +43,7 @@
 #endif
 
 // Base class for wxSound implementations
-class wxSoundBase : public wxObject
+class WXDLLIMPEXP_ADV wxSoundBase : public wxObject
 {
 public:
     // Play the sound: