diff --git a/dlls/dswave/dswave.c b/dlls/dswave/dswave.c
index 1b83d5ab053..e6d85d738fe 100644
--- a/dlls/dswave/dswave.c
+++ b/dlls/dswave/dswave.c
@@ -175,7 +175,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dswave(REFIID lpcGUID, void **ppobj)
+HRESULT create_dswave(REFIID lpcGUID, void **ppobj)
 {
     IDirectMusicWaveImpl *obj;
     HRESULT hr;
diff --git a/dlls/dswave/dswave_private.h b/dlls/dswave/dswave_private.h
index 5b5eb7a937d..dfd8ed6f51c 100644
--- a/dlls/dswave/dswave_private.h
+++ b/dlls/dswave/dswave_private.h
@@ -42,7 +42,7 @@
 /*****************************************************************************
  * ClassFactory
  */
-extern HRESULT WINAPI create_dswave(REFIID lpcGUID, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dswave(REFIID lpcGUID, void **ret_iface) DECLSPEC_HIDDEN;
 
 /**********************************************************************
  * Dll lifetime tracking declaration for dswave.dll