diff --git a/domus.nix b/domus.nix
index 4a91787..6e7905b 100644
--- a/domus.nix
+++ b/domus.nix
@@ -223,7 +223,7 @@
 
   # Open ports in the firewall.
   networking.firewall.allowedTCPPorts = [ 80  443  2342  8384  8080  22000 ];
-  networking.firewall.allowedUDPPorts = [ 220000 21027 ];
+  networking.firewall.allowedUDPPorts = [ 22000 21027 ];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;