- "\\DeclareRobustCommand{\\greektext}{%\n"
- " \\fontencoding{LGR}\\selectfont\\def\\encodingdefault{LGR}}\n"
+ "\\providecommand*{\\perispomeni}{\\char126}\n"
+ "\\AtBeginDocument{\\DeclareRobustCommand{\\greektext}{%\n"
+ " \\fontencoding{LGR}\\selectfont\\def\\encodingdefault{LGR}%\n"
+ " \\renewcommand{\\~}{\\perispomeni}\n"
+ "}}\n"