diff --git a/drive.inc b/drive.inc
index aaee55e..df4dab6 100644
--- a/drive.inc
+++ b/drive.inc
@@ -8,6 +8,7 @@ function setup_drive
         unit MiB \
         mkpart '"EFI system partition"' fat32 1 1024 \
         set 1 esp on \
+        set 1 legacy_boot on \
         mkpart '"root unused"' ext4 1025 2048 \
         mkpart '"root unused"' ext4 2049 3072 \
         mkpart '"root unused"' ext4 3073 4096 \
diff --git a/tests/data/parted.dat b/tests/data/parted.dat
index 9298ef4..7c30064 100644
--- a/tests/data/parted.dat
+++ b/tests/data/parted.dat
@@ -1,6 +1,6 @@
 BYT;
 T_E_M_P:17.2GB:file:512:512:gpt::;
-1:1049kB:1074MB:1073MB::EFI system partition:boot, esp;
+1:1049kB:1074MB:1073MB::EFI system partition:boot, legacy_boot, esp;
 2:1075MB:2147MB:1073MB::root unused:;
 3:2149MB:3221MB:1073MB::root unused:;
 4:3222MB:4295MB:1073MB::root unused:;
diff --git a/tests/data/rename.dat b/tests/data/rename.dat
index 2f52f96..6badbe6 100644
--- a/tests/data/rename.dat
+++ b/tests/data/rename.dat
@@ -1,6 +1,6 @@
 BYT;
 T_E_M_P:17.2GB:file:512:512:gpt::;
-1:1049kB:1074MB:1073MB::EFI system partition:boot, esp;
+1:1049kB:1074MB:1073MB::EFI system partition:boot, legacy_boot, esp;
 2:1075MB:2147MB:1073MB::root renamed:;
 3:2149MB:3221MB:1073MB::root unused:;
 4:3222MB:4295MB:1073MB::root unused:;