diff --git a/modules/outputs/tftpboot.nix b/modules/outputs/tftpboot.nix
index 9c6d0389..e91c988e 100644
--- a/modules/outputs/tftpboot.nix
+++ b/modules/outputs/tftpboot.nix
@@ -121,6 +121,7 @@ in {
             node=$(printf "phram-rootfs@%x" $rootfsStart)
             fdtput -p -t s dtb /reserved-memory/$node compatible phram
             fdtput -p -t lx dtb /reserved-memory/$node reg $ac_prefix $(hex $rootfsStart) $sz_prefix $(hex $rootfsSize)
+            fdtput -p dtb /reserved-memory/$node no-map
 
             cmd="liminix ${cmdline} mtdparts=phram0:''${rootfsSize}(rootfs) phram.phram=phram0,''${rootfsStart},''${rootfsSize},${toString config.hardware.flash.eraseBlockSize} root=/dev/mtdblock0";
             fdtput -t s dtb /chosen ${config.boot.commandLineDtbNode} "$cmd"