diff --git a/modules/nixos/services/gui/default.nix b/modules/nixos/services/gui/default.nix
index 717a4f3..ad079f7 100644
--- a/modules/nixos/services/gui/default.nix
+++ b/modules/nixos/services/gui/default.nix
@@ -15,7 +15,7 @@ in
 
       flatpak.enable = true;
 
-      pcscd.enable = false;
+      pcscd.enable = lib.mkDefault false;
 
       # Enable CUPS to print documents.
       printing.enable = true;