diff --git a/docs/backup.md b/docs/backup.md
index 027277c8..5aa5b5d8 100644
--- a/docs/backup.md
+++ b/docs/backup.md
@@ -48,7 +48,7 @@ This will do the following:
* Automated pruning of backup files, daily kept for 2 weeks, weekly for 2 months and monthly for 1 year. To calculate estimated disk needs, take the size of a manual backup and * 37. eg 600MB backup * 37 = 22.2GB of space needed.