diff --git a/scripts/mosh b/scripts/mosh
index 5669a17..f3b2994 100755
--- a/scripts/mosh
+++ b/scripts/mosh
@@ -200,7 +200,8 @@ if ( $pid == 0 ) { # child
     push @server, '--', @command;
   }
 
-  exec 'ssh', '-S', 'none', '-o', "ProxyCommand=$0 --fake-proxy -- %h %p", '-t', $userhost, '--', "$server " . shell_quote( @server );
+  my $quoted_self = shell_quote( $0 );
+  exec 'ssh', '-S', 'none', '-o', "ProxyCommand=$quoted_self --fake-proxy -- %h %p", '-t', $userhost, '--', "$server " . shell_quote( @server );
   die "Cannot exec ssh: $!\n";
 } else { # server
   my ( $ip, $port, $key );