diff --git a/dlls/dmloader/container.c b/dlls/dmloader/container.c
index 68ee5738395..871c8b0f433 100644
--- a/dlls/dmloader/container.c
+++ b/dlls/dmloader/container.c
@@ -909,7 +909,8 @@ static const IPersistStreamVtbl DirectMusicContainer_PersistStream_Vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI DMUSIC_CreateDirectMusicContainerImpl (LPCGUID lpcGUID, LPVOID* ppobj, LPUNKNOWN pUnkOuter) {
+HRESULT WINAPI create_dmcontainer(REFIID lpcGUID, void **ppobj)
+{
 	IDirectMusicContainerImpl* obj;
 
 	obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicContainerImpl));
diff --git a/dlls/dmloader/dmloader_main.c b/dlls/dmloader/dmloader_main.c
index eaed6339a91..38faa8e22e1 100644
--- a/dlls/dmloader/dmloader_main.c
+++ b/dlls/dmloader/dmloader_main.c
@@ -27,7 +27,7 @@ LONG module_ref = 0;
 
 typedef struct {
     IClassFactory IClassFactory_iface;
-    HRESULT WINAPI (*fnCreateInstance)(REFIID riid, void **ppv, IUnknown *pUnkOuter);
+    HRESULT WINAPI (*fnCreateInstance)(REFIID riid, void **ppv);
 } IClassFactoryImpl;
 
 /******************************************************************
@@ -73,13 +73,18 @@ static ULONG WINAPI ClassFactory_Release(IClassFactory *iface)
 }
 
 static HRESULT WINAPI ClassFactory_CreateInstance(IClassFactory *iface, IUnknown *pUnkOuter,
-    REFIID riid, void **ppv)
+    REFIID riid, void **ret_iface)
 {
     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
 
-    TRACE ("(%p, %s, %p)\n", pUnkOuter, debugstr_dmguid(riid), ppv);
+    TRACE ("(%s, %p)\n", debugstr_dmguid(riid), ret_iface);
 
-    return This->fnCreateInstance(riid, ppv, pUnkOuter);
+    if (pUnkOuter) {
+        *ret_iface = NULL;
+        return CLASS_E_NOAGGREGATION;
+    }
+
+    return This->fnCreateInstance(riid, ret_iface);
 }
 
 static HRESULT WINAPI ClassFactory_LockServer(IClassFactory *iface, BOOL dolock)
@@ -102,9 +107,8 @@ static const IClassFactoryVtbl classfactory_vtbl = {
     ClassFactory_LockServer
 };
 
-static IClassFactoryImpl dm_loader_CF = {{&classfactory_vtbl}, DMUSIC_CreateDirectMusicLoaderImpl};
-static IClassFactoryImpl dm_container_CF = {{&classfactory_vtbl},
-                                            DMUSIC_CreateDirectMusicContainerImpl};
+static IClassFactoryImpl dm_loader_CF = {{&classfactory_vtbl}, create_dmloader};
+static IClassFactoryImpl dm_container_CF = {{&classfactory_vtbl}, create_dmcontainer};
 
 /******************************************************************
  *		DllMain
diff --git a/dlls/dmloader/dmloader_private.h b/dlls/dmloader/dmloader_private.h
index e3930809c03..f01acfc0538 100644
--- a/dlls/dmloader/dmloader_private.h
+++ b/dlls/dmloader/dmloader_private.h
@@ -65,8 +65,8 @@ typedef struct IDirectMusicLoaderGenericStream  IDirectMusicLoaderGenericStream;
 /*****************************************************************************
  * Creation helpers
  */
-extern HRESULT WINAPI DMUSIC_CreateDirectMusicLoaderImpl (LPCGUID lpcGUID, LPVOID *ppobj, LPUNKNOWN pUnkOuter) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI DMUSIC_CreateDirectMusicContainerImpl (LPCGUID lpcGUID, LPVOID *ppobj, LPUNKNOWN pUnkOuter) DECLSPEC_HIDDEN;
+extern HRESULT WINAPI create_dmloader(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT WINAPI create_dmcontainer(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
 extern HRESULT WINAPI DMUSIC_CreateDirectMusicLoaderFileStream (LPVOID *ppobj) DECLSPEC_HIDDEN;
 extern HRESULT WINAPI DMUSIC_CreateDirectMusicLoaderResourceStream (LPVOID *ppobj) DECLSPEC_HIDDEN;
 extern HRESULT WINAPI DMUSIC_CreateDirectMusicLoaderGenericStream (LPVOID *ppobj) DECLSPEC_HIDDEN;
diff --git a/dlls/dmloader/loader.c b/dlls/dmloader/loader.c
index 39f00a0301f..967b093f135 100644
--- a/dlls/dmloader/loader.c
+++ b/dlls/dmloader/loader.c
@@ -888,14 +888,14 @@ static HRESULT DMUSIC_GetDefaultGMPath (WCHAR wszPath[MAX_PATH]) {
 }
 
 /* for ClassFactory */
-HRESULT WINAPI DMUSIC_CreateDirectMusicLoaderImpl(const GUID *lpcGUID, void **ppobj, IUnknown *pUnkOuter)
+HRESULT WINAPI create_dmloader(REFIID lpcGUID, void **ppobj)
 {
 	IDirectMusicLoaderImpl *obj;
 	DMUS_OBJECTDESC Desc;
 	LPWINE_LOADER_ENTRY pDefaultDLSEntry;
 	struct list *pEntry;
 
-	TRACE("(%s, %p, %p)\n", debugstr_dmguid(lpcGUID), ppobj, pUnkOuter);
+        TRACE("(%s, %p)\n", debugstr_dmguid(lpcGUID), ppobj);
 	obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicLoaderImpl));
 	if (NULL == obj) {
 		*ppobj = NULL;