diff --git a/devices/zyxel-nwa50ax/default.nix b/devices/zyxel-nwa50ax/default.nix
index e53e28f..393dcac 100644
--- a/devices/zyxel-nwa50ax/default.nix
+++ b/devices/zyxel-nwa50ax/default.nix
@@ -224,6 +224,7 @@
         tftp = {
           # 5MB is nice.
           freeSpaceBytes = 5 * 1024 * 1024;
+          appendDTB = true;
           loadAddress = lim.parseInt "0x2000000";
         };
       };