diff --git a/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary b/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary
index d7885346..3cf55ed1 100755
--- a/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary
+++ b/live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary
@@ -78,7 +78,7 @@ install_grub() {
     esac
 
     cat << EOF >> mountpoint/etc/default/grub.d/50-cloudimg-settings.cfg
-${CLOUD_IMG_STR}
+${IMAGE_STR}
 # For Cloud Image compatability
 GRUB_PRELOAD_MODULES="${grub_modules}"
 EOF
@@ -93,7 +93,7 @@ EOF
 
     if [ -f mountpoint/boot/efi/EFI/BOOT/grub.cfg ]; then
         sed -i "s| root| root hd0,gpt1|" mountpoint/boot/efi/EFI/BOOT/grub.cfg
-        sed -i "1i${CLOUD_IMG_STR}" mountpoint/boot/efi/EFI/BOOT/grub.cfg
+        sed -i "1i${IMAGE_STR}" mountpoint/boot/efi/EFI/BOOT/grub.cfg
         # For some reason the grub disk is looking for /boot/grub/grub.cfg on
         # part 15....
         chroot mountpoint mkdir -p /boot/efi/boot/grub
diff --git a/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary b/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary
index 55e1dc84..bad7297d 100755
--- a/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary
+++ b/live-build/ubuntu-cpc/hooks/034-disk-image-ppc64el.binary
@@ -36,7 +36,7 @@ install_grub() {
     # set the kernel commandline to use hvc0
     mkdir -p mountpoint/etc/default/grub.d
     cat << EOF > mountpoint/etc/default/grub.d/50-cloudimg-settings.cfg
-${CLOUD_IMG_STR}
+${IMAGE_STR}
 
 # Set the recordfail timeout
 GRUB_RECORDFAIL_TIMEOUT=0