diff --git a/nixos/modules/security/pam.nix b/nixos/modules/security/pam.nix
index 40bec8d0791..a20d0a243a8 100644
--- a/nixos/modules/security/pam.nix
+++ b/nixos/modules/security/pam.nix
@@ -653,7 +653,7 @@ in
           xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
         '';
       };
-      
+
       appId = mkOption {
         default = null;
         type = with types; nullOr str;