diff --git a/docs/README.bootparams b/docs/README.bootparams
index 13e1ead..8063bd1 100644
--- a/docs/README.bootparams
+++ b/docs/README.bootparams
@@ -9,6 +9,8 @@ INDEX
   * hooks/archiso_pxe_nfs
   * hooks/archiso_loop_mnt
 
+* Boot parameters (configs/releng)
+  * scripts/choose-mirror
 
 
 *** Boot parameters (initramfs stage)
@@ -125,3 +127,15 @@ INDEX
                     Default: (unset) or "/dev/disk/by-label/${img_label}"
 * img_loop=         Full path where archiso-image.iso is located on ${img_dev}
                     Default: (unset)
+
+
+
+*** Boot parameters (configs/releng)
+
+** scripts/choose-mirror
+
+* mirror=           Takes a mirror URL and creates a new mirrorlist.
+                    When setting mirror=auto, the mirror is taken from
+                    archiso_http_srv= in order to keep using the mirror
+                    selected in the netboot menu.
+                    Default: (unset)