diff --git a/overlays/default.nix b/overlays/default.nix
index 0571d9d..0d65aa5 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -37,6 +37,7 @@ in
   # disable firmware compression so that brcm firmware can be found at
   # the path expected by raspberry pi firmware/device tree
   compressFirmwareXz = x: x;
+  compressFirmwareZstd = x: x;
 
   # provide generic rpi arm64 u-boot
   uboot_rpi_arm64 = prev.buildUBoot rec {