size_t WXZIPFIX OnSysRead(void *buffer, size_t size);
wxFileOffset OnSysTell() const { return m_decomp ? m_decomp->TellI() : 0; }
-#if WXWIN_COMPATIBILITY_2_6 && wxUSE_FFILE
+#if WXWIN_COMPATIBILITY_2_6
wxFileOffset WXZIPFIX OnSysSeek(wxFileOffset seek, wxSeekMode mode);
#endif