diff --git a/scripts/w3mman/w3mman2html.cgi.in b/scripts/w3mman/w3mman2html.cgi.in
index 2d326a9..59af785 100644
--- a/scripts/w3mman/w3mman2html.cgi.in
+++ b/scripts/w3mman/w3mman2html.cgi.in
@@ -81,7 +81,7 @@ if ($query{"local"}) {
   if (! ($file =~ /^\//)) {
     $file = $query{"pwd"} . '/' . $file;
   }
-  open(F, "MAN_KEEP_FORMATTING=1 $MAN $file 2> /dev/null |");
+  open(F, "GROFF_NO_SGR=1 MAN_KEEP_FORMATTING=1 $MAN $file 2> /dev/null |");
 } else {
   $man = $query{"man"};
   if ($man =~ s/\((\w+)\)$//) {
@@ -97,7 +97,7 @@ if ($query{"local"}) {
 
   $section =~ s:([^-\w\200-\377.,])::g;
   $man =~ s:([^-\w\200-\377.,])::g;
-  open(F, "MAN_KEEP_FORMATTING=1 $MAN $section $man 2> /dev/null |");
+  open(F, "GROFF_NO_SGR=1 MAN_KEEP_FORMATTING=1 $MAN $section $man 2> /dev/null |");
 }
 $ok = 0;
 undef $header;