diff --git a/Earthfile b/Earthfile
index 163c0df1..1b9e0efa 100644
--- a/Earthfile
+++ b/Earthfile
@@ -841,7 +841,7 @@ iso-efi-size-check:
     RUN mcopy -i fat.img esp/ABC ::
     RUN mkdir -p iso
     RUN cp fat.img iso
-    RUN xorriso -as mkisofs -e fat.img -no-emul-boot -o efi-size-check.iso iso
+    RUN xorriso -as mkisofs -e fat.img -no-emul-boot -isohybrid-gpt-basdat -o efi-size-check.iso iso
 
     SAVE ARTIFACT efi-size-check.iso AS LOCAL ./build/