\defpagestyle{oneright}{(0pt,0pt){}{}{\hfill\headmark}(\textwidth,0.4pt)}
                       {(0pt,0pt){}{}{\hfill\pagemark\hfill}(0pt,0pt)}

\pagestyle{oneright}

aspell.exe -d de_DE --encoding=iso8859-1 -c file.tex