diff --git a/HowtoSecureMailServer.page b/HowtoSecureMailServer.page
index 13f39b2..0e4023f 100644
--- a/HowtoSecureMailServer.page
+++ b/HowtoSecureMailServer.page
@@ -2,6 +2,7 @@ Notes...
 
 ```
 # dd if=/dev/zero of=/var.img bs=1M count=36000
+# chmod 600 /var.img
 # losetup /dev/loop0 /var.img
 # cryptsetup luksFormat --hash sha256 --key-size=512 /dev/loop0
 # cryptsetup luksOpen /dev/loop0 crypted-var