diff --git a/dlls/amstream/mediastreamfilter.c b/dlls/amstream/mediastreamfilter.c
index 7f57e607113..73dcc3d31b5 100644
--- a/dlls/amstream/mediastreamfilter.c
+++ b/dlls/amstream/mediastreamfilter.c
@@ -82,15 +82,15 @@ static HRESULT WINAPI MediaStreamFilterImpl_QueryInterface(IMediaStreamFilter *
     *ppv = NULL;
 
     if (IsEqualIID(riid, &IID_IUnknown))
-        *ppv = (LPVOID)This;
+        *ppv = This;
     else if (IsEqualIID(riid, &IID_IPersist))
-        *ppv = (LPVOID)This;
+        *ppv = This;
     else if (IsEqualIID(riid, &IID_IMediaFilter))
-        *ppv = (LPVOID)This;
+        *ppv = This;
     else if (IsEqualIID(riid, &IID_IBaseFilter))
-        *ppv = (LPVOID)This;
+        *ppv = This;
     else if (IsEqualIID(riid, &IID_IMediaStreamFilter))
-        *ppv = (LPVOID)This;
+        *ppv = This;
 
     if (*ppv)
     {