diff --git a/chroot_version_hooks.d/18_noop b/chroot_version_hooks.d/18_noop
new file mode 100644
index 0000000000..b523eca776
--- /dev/null
+++ b/chroot_version_hooks.d/18_noop
@@ -0,0 +1,6 @@
+# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# No-op, this change is being reverted
+exit 0
diff --git a/chroot_version_hooks.d/18_grub_upgrade b/chroot_version_hooks.d/21_grub_downgrade
similarity index 74%
rename from chroot_version_hooks.d/18_grub_upgrade
rename to chroot_version_hooks.d/21_grub_downgrade
index 27c7a0b823..bcf6117a7c 100644
--- a/chroot_version_hooks.d/18_grub_upgrade
+++ b/chroot_version_hooks.d/21_grub_downgrade
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-CLEAN_DELAY=0 sudo emerge --unmerge =sys-boot/grub-1.97-r2
+CLEAN_DELAY=0 sudo emerge --unmerge =sys-boot/grub-1.99-r2
 
 exit 0
+