diff --git a/dlls/msxml3/xmlelem.c b/dlls/msxml3/xmlelem.c
index 52eef623fb0..e1ef0eb13a5 100644
--- a/dlls/msxml3/xmlelem.c
+++ b/dlls/msxml3/xmlelem.c
@@ -573,6 +573,7 @@ static HRESULT WINAPI xmlelem_collection_QueryInterface(IXMLElementCollection *i
     else
     {
         FIXME("interface %s not implemented\n", debugstr_guid(riid));
+        *ppvObject = NULL;
         return E_NOINTERFACE;
     }