diff --git a/README.md b/README.md
index 1d882dd..d32ddee 100644
--- a/README.md
+++ b/README.md
@@ -60,4 +60,4 @@ Maintenance - Clean Up BTRFS old_roots
 - cd /mnt/old_roots
 - sudo du -h -d 1
 - sudo rm -rf [snapshot here]
-
+- sudo umount /mnt