diff --git a/recovery/boot.conf b/recovery/boot.conf
index 36c1165..7bad47c 100644
--- a/recovery/boot.conf
+++ b/recovery/boot.conf
@@ -3,6 +3,7 @@ BOOT_UART=0
 WAKE_ON_GPIO=1
 POWER_OFF_ON_HALT=0
 
+# Boot Order Codes, from https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#BOOT_ORDER
 # Try SD first (1), followed by, USB PCIe, NVMe PCIe, USB SoC XHCI then network
 BOOT_ORDER=0xf25641