dumpcpp generates code that does not compile

With some controls, dumpcpp is generating code that looks like:

ExtensionData(IExtensionData *iface)
    : QAxObject()
    {
        initializeFrom(iface);
        delete iface;
    }

    ExtensionData(IDispatch *iface)
    : QAxObject()
    {
        initializeFrom(iface);
        delete iface;
    }

which does not compile because initalizeFrom takes a QAxBase pointer and not something based on IUnknown.

This can be reproduced by running dumpcpp on the control installed - https://support.elecosoft.com/downloads/PP16002-316-English-standard-64bit.exe - the CLSID is A57A0000-0200-0000-B2C5-00C0DF438041 and the Type Library is called "Teamplan" and its ID is A57A0000-0200-711B-B2C5-00C0DF438041.