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diff --git a/doc/README.pxe b/doc/README.pxe
index b67151ca51..a1f0423adb 100644
--- a/doc/README.pxe
+++ b/doc/README.pxe
@@ -92,6 +92,12 @@ pxe boot
fdtoverlay_addr_r - location in RAM at which 'pxe boot' will temporarily store
fdt overlay(s) before applying them to the fdt blob stored at 'fdt_addr_r'.
+ pxe_label_override - override label to be used, if exists, instead of the
+ default label. This will allow consumers to choose a pxe label at
+ runtime instead of having to prompt the user. If "pxe_label_override" is set
+ but does not exist in the pxe menu, pxe would fallback to the default label if
+ given, and no failure is returned but rather a warning message.
+
pxe file format
===============
The pxe file format is nearly a subset of the PXELINUX file format; see