diff --git a/sync/import-snapshot-publish-aws.sh b/sync/import-snapshot-publish-aws.sh
index 4c68f20..fc03a80 100755
--- a/sync/import-snapshot-publish-aws.sh
+++ b/sync/import-snapshot-publish-aws.sh
@@ -103,7 +103,7 @@ register-image() {
 		;;
 	esac
 
-	ami_id=$(aws --query "ImageId" ec2 register-image --name "$name" --description "$name" --block-device-mappings DeviceName="/dev/sda1",Ebs={SnapshotId="$snapshot_id"} --root-device-name "/dev/sda1" --virtualization-type hvm --architecture $arch --ena-support)
+	ami_id=$(aws --query "ImageId" ec2 register-image --name "$name" --description "$name" --block-device-mappings DeviceName="/dev/sda1",Ebs={SnapshotId="$snapshot_id"} --root-device-name "/dev/sda1" --virtualization-type hvm --architecture $arch --ena-support --boot-mode uefi-preferred)
 
 	if [[ -z "$ami_id" ]]; then
 		return 1