diff --git a/Debian-Stretch-Root-on-ZFS.md b/Debian-Stretch-Root-on-ZFS.md
index 4445911..49c44b9 100644
--- a/Debian-Stretch-Root-on-ZFS.md
+++ b/Debian-Stretch-Root-on-ZFS.md
@@ -220,6 +220,8 @@ Choose one of the following options:
 
     # apt install --yes grub-pc
 
+Install GRUB to the disk(s), not the partition(s).
+
 4.7b  Install GRUB for UEFI booting
 
     # apt install dosfstools