--- a/configure.ac
+++ b/configure.ac
@@ -132,7 +132,7 @@ AC_DEFINE(CHANNELS, 8, [max number of channels])
 
 AC_DEFINE(MSECREFRESH, 30, [minimum number of milliseconds between refresh on libsx version])
 
-AC_DEFINE(HELPCOMMAND, "man -Tutf8 xoscope 2>&1", [shell command for X11 help])
+AC_DEFINE(HELPCOMMAND, "man xoscope 2>&1", [shell command for X11 help])
 
 AC_DEFINE(FILENAME, "oscope.dat", [default file name])