diff --git a/scripts/mosh.pl b/scripts/mosh.pl
index 07f8f26..acb8234 100755
--- a/scripts/mosh.pl
+++ b/scripts/mosh.pl
@@ -221,11 +221,8 @@ if ( ! defined $fake_proxy ) {
     }
   } elsif ( $bind_ip =~ m{^any$}i ) {
     # do nothing
-  } elsif ( $bind_ip =~ m{^[0-9\.]+$} ) {
-    push @bind_arguments, ('-i', "$bind_ip");
   } else {
-    print STDERR qq{$0: Unknown server binding option: $bind_ip\n};
-    die $usage;
+    push @bind_arguments, ('-i', "$bind_ip");
   }
 } else {
   my ( $host, $port ) = @ARGV;