:: commit 9f937d95559c2ab0c19a0e50588be52938c92ec2

diff --git a/USAGE.md b/USAGE.md
index b82626d4..ad8f7b4a 100644
--- a/USAGE.md
+++ b/USAGE.md
@@ -74,6 +74,15 @@ xorriso -as mkisofs -R -r -J -b <relative path of limine-bios-cd.bin> \
 
 *Note: `xorriso` is required.*
 
+For better compatibility with BIOS/CSM systems that refuse to boot from disks that
+have a GPT partition table, one can convert the GPT table generated by `xorriso`
+into an MBR by using `sgdisk` with the following command:
+```
+sgdisk image.iso -m 1:2:3:4
+```
+
+*Note: `sgdisk` is required, usually from a `gdisk` or `gptfdisk` package*
+
 And do not forget to also run `limine bios-install` on the generated image:
 ```
 limine bios-install image.iso