- inline bool operator == (const wxMetafile& metafile) { return m_refData == metafile.m_refData; }
- inline bool operator != (const wxMetafile& metafile) { return m_refData != metafile.m_refData; }
+ inline bool operator == (const wxMetafile& metafile) const { return m_refData == metafile.m_refData; }
+ inline bool operator != (const wxMetafile& metafile) const { return m_refData != metafile.m_refData; }