diff --git a/README.md b/README.md
index 2cfbbd5..11f9b76 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,6 @@ gnu coreutils v9, in earlier versions
 
 relies on coreutils (ls and tr), and grep with
 the -P option
+
+simply source ls_zero.bash in your .bashrc,
+place it in /etc/profile.d, or similar
\ No newline at end of file