diff --git a/README.md b/README.md
index ea4d969..bdc8633 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,5 @@ backup-rotation-script
 ======================
 
 Linux bash script to rotate backups. Originally from http://thehappyengineer.blogspot.com/2012/07/automated-rotation-backup-script.html
+
+Usage: ./rotate.sh source_folder destination_folder