script/lei | 1 +

diff --git a/script/lei b/script/lei
index 2d84487a89dc5d27acd2771339b4525463198b30..591013e3804ab6979f429e2aa00f6fba351cf26a 100755
--- a/script/lei
+++ b/script/lei
@@ -53,6 +53,7 @@ 			fcntl($_, Fcntl::F_SETFD(), 0) for @non_std;
 		}
 		my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
 		@ENV{keys %env} = values %env;
+		umask 077;
 		exec(@argv);
 		warn "exec: @argv: $!\n";
 		POSIX::_exit(1);