|| IGNORE_DEFFACE_P (attrs[LFACE_FONT_INDEX])
|| FONTP (attrs[LFACE_FONT_INDEX]));
xassert (UNSPECIFIEDP (attrs[LFACE_FONTSET_INDEX])
- || STRINGP (attrs[LFACE_FONTSET_INDEX]));
+ || STRINGP (attrs[LFACE_FONTSET_INDEX])
+ || NILP (attrs[LFACE_FONTSET_INDEX]));
#endif
}