diff --git a/scripts/lib/wic/canned-wks/efi-uki-bootdisk.wks.in b/scripts/lib/wic/canned-wks/efi-uki-bootdisk.wks.in
index 1ea9c8a845..67cc41a241 100644
--- a/scripts/lib/wic/canned-wks/efi-uki-bootdisk.wks.in
+++ b/scripts/lib/wic/canned-wks/efi-uki-bootdisk.wks.in
@@ -1,3 +1,3 @@
 bootloader --ptable gpt --timeout=5
-part /boot --source bootimg-efi --sourceparams="loader=${EFI_PROVIDER}" --label boot --active --align 1024 --use-uuid --part-name="ESP" --part-type=C12A7328-F81F-11D2-BA4B-00A0C93EC93B --fixed-size 512M
+part /boot --source bootimg-efi --sourceparams="loader=${EFI_PROVIDER}" --label boot --active --align 1024 --use-uuid --part-name="ESP" --part-type=C12A7328-F81F-11D2-BA4B-00A0C93EC93B --overhead-factor=1
 part / --source rootfs --fstype=ext4 --label root --align 1024 --exclude-path boot/