diff --git a/dlls/avifil32/acmstream.c b/dlls/avifil32/acmstream.c
index 845ea164aa6..7bf05d23c30 100644
--- a/dlls/avifil32/acmstream.c
+++ b/dlls/avifil32/acmstream.c
@@ -143,7 +143,7 @@ static HRESULT WINAPI ACMStream_fnQueryInterface(IAVIStream *iface,
 
   if (IsEqualGUID(&IID_IUnknown, refiid) ||
       IsEqualGUID(&IID_IAVIStream, refiid)) {
-    *obj = This;
+    *obj = &This->IAVIStream_iface;
     IAVIStream_AddRef(iface);
 
     return S_OK;
diff --git a/dlls/avifil32/icmstream.c b/dlls/avifil32/icmstream.c
index eaca594049d..1b86d00dab1 100644
--- a/dlls/avifil32/icmstream.c
+++ b/dlls/avifil32/icmstream.c
@@ -97,7 +97,7 @@ static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
 
   if (IsEqualGUID(&IID_IUnknown, refiid) ||
       IsEqualGUID(&IID_IAVIStream, refiid)) {
-    *obj = This;
+    *obj = &This->IAVIStream_iface;
     IAVIStream_AddRef(iface);
 
     return S_OK;