diff --git a/firmware/beta/pieeprom-2021-12-09.bin b/firmware/beta/pieeprom-2021-12-09.bin
new file mode 100755
index 0000000..6a00581
Binary files /dev/null and b/firmware/beta/pieeprom-2021-12-09.bin differ
diff --git a/firmware/release-notes.md b/firmware/release-notes.md
index db18a92..d333a53 100644
--- a/firmware/release-notes.md
+++ b/firmware/release-notes.md
@@ -3,6 +3,9 @@
 USB MSD boot also requires the firmware from Raspberry Pi OS 2020-08-20 or newer.
 https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-4-bootloader-configuration
 
+## 2021-12-09 - Fix MTB detection for factory test - BETA
+   * Just fixes a regression with MTB detection affecting factory testing
+
 ## 2021-12-09 - Update default recovery.bin
    * Promote the recovery.bin from stable to default. This avoids an issue
      where recovery.bin fails to load on large FAT32 boot partions with 32K