diff --git a/hosts/joker/default.nix b/hosts/joker/default.nix
index 4ca9094..e6cecae 100644
--- a/hosts/joker/default.nix
+++ b/hosts/joker/default.nix
@@ -137,7 +137,7 @@
   # services.openssh.enable = true;
 
   # Open ports in the firewall.
-  # networking.firewall.allowedTCPPorts = [ ... ];
+  networking.firewall.allowedTCPPorts = [ 9100 ];
   # networking.firewall.allowedUDPPorts = [ ... ];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;