diff --git a/dlls/mfsrcsnk/mfsrcsnk_private.h b/dlls/mfsrcsnk/mfsrcsnk_private.h
index 29249d640f8..6654daebbd3 100644
--- a/dlls/mfsrcsnk/mfsrcsnk_private.h
+++ b/dlls/mfsrcsnk/mfsrcsnk_private.h
@@ -18,4 +18,4 @@
 
 #include "wine/mfinternal.h"
 
-extern HRESULT wave_sink_factory_create(REFIID riid, void **out) DECLSPEC_HIDDEN;
+extern HRESULT wave_sink_factory_create(REFIID riid, void **out);