diff --git a/Ubuntu-16.04-Root-on-ZFS.md b/Ubuntu-16.04-Root-on-ZFS.md
index 4a1f7d2..86ba635 100644
--- a/Ubuntu-16.04-Root-on-ZFS.md
+++ b/Ubuntu-16.04-Root-on-ZFS.md
@@ -201,6 +201,8 @@ Choose one of the following options:
 
     # apt install --yes grub-pc
 
+Install GRUB to the disk(s), not the partition(s).
+
 4.6b  Install GRUB for UEFI booting
 
     # apt install dosfstools
diff --git a/Ubuntu-16.10-Root-on-ZFS.md b/Ubuntu-16.10-Root-on-ZFS.md
index 7320916..8b5e7de 100644
--- a/Ubuntu-16.10-Root-on-ZFS.md
+++ b/Ubuntu-16.10-Root-on-ZFS.md
@@ -197,6 +197,8 @@ Choose one of the following options:
 
     # apt install --yes grub-pc
 
+Install GRUB to the disk(s), not the partition(s).
+
 4.6b  Install GRUB for UEFI booting
 
     # apt install dosfstools
diff --git a/Ubuntu-17.04-Root-on-ZFS.md b/Ubuntu-17.04-Root-on-ZFS.md
index e457a7f..ba81981 100644
--- a/Ubuntu-17.04-Root-on-ZFS.md
+++ b/Ubuntu-17.04-Root-on-ZFS.md
@@ -212,6 +212,8 @@ Choose one of the following options:
 
     # apt install --yes grub-pc
 
+Install GRUB to the disk(s), not the partition(s).
+
 4.6b  Install GRUB for UEFI booting
 
     # apt install dosfstools