diff --git a/includes/disk-layout.ksi b/includes/disk-layout.ksi
index 4034a47..955c125 100644
--- a/includes/disk-layout.ksi
+++ b/includes/disk-layout.ksi
@@ -1,5 +1,8 @@
+# initialize the disk
+zerombr
+
 # Remove all partitions
-clearpart --drives=sda --all
+clearpart --drives=sda --all --disklabel=gpt
 
 # Create partitions
 # The '--size' option takes MB, not MiB