diff --git a/Hardware/Rpi4.md b/Hardware/Rpi4.md
index 36260b9614..b3a553b151 100644
--- a/Hardware/Rpi4.md
+++ b/Hardware/Rpi4.md
@@ -42,6 +42,7 @@ they should be located in the root directory of this partition.
 |-|-|-|-|
 |FSBL |- |Mounts SD and loads SSBL |ROM |
 |GPU firmware |start4.elf |Loads CPU bootloader and boots CPU |<https://github.com/raspberrypi/firmware/tree/master/boot/start4.elf> |
+|Additional GPU firmware |fixup4.dat |Fixes memory locations used in start4.elf |<https://github.com/raspberrypi/firmware/tree/master/boot/fixup4.dat> |
 |Usually the Linux kernel, but could also be U-Boot |u-boot.bin |U-Boot binary| Compiled using the instructions above |
 ||config.txt|U-Boot parameters |Add `arm_64bit=1` and `kernel=u-boot.bin` to the bottom of `config.txt` |
 ||uboot.env |U-Boot saved environment |Generated by U-Boot (default environment) bootcmd copied to bootcmd_orig bootcmd and bootdelay removed. This file will not exist when you first setup your SD card. |