diff --git a/xterm/shellserver.pl b/xterm/shellserver.pl
index 004fc9c6e..76cd35f26 100755
--- a/xterm/shellserver.pl
+++ b/xterm/shellserver.pl
@@ -83,7 +83,7 @@ Net::WebSocket::Server->new(
                 },
             utf8 => sub {
                 my ($conn, $msg) = @_;
-		utf8::encode($msg) if (utf8::is_utf8($msg));
+                utf8::encode($msg) if (utf8::is_utf8($msg));
                 if (!syswrite($shellfh, $msg, length($msg))) {
                     print STDERR "write to shell failed : $!\n";
                     &cleanup_miniserv();