diff --git a/unix/vncserver b/unix/vncserver
index 6ec5866..d56f5e2 100755
--- a/unix/vncserver
+++ b/unix/vncserver
@@ -176,7 +176,7 @@
     if (!&CheckDisplayNumber($displayNumber)) {
 	die "A VNC server is already running as :$displayNumber\n";
     }
-} elsif ((@ARGV > 0) && ($ARGV[0] !~ /^-/)) {
+} elsif ((@ARGV > 0) && ($ARGV[0] !~ /^-/) && ($ARGV[0] !~ /^\+/)) {
     &Usage();
 } else {
     $displayNumber = &GetDisplayNumber();