diff --git a/nixos/modules/security/pam.nix b/nixos/modules/security/pam.nix
index 0944b36c6d19..21202c55fe28 100644
--- a/nixos/modules/security/pam.nix
+++ b/nixos/modules/security/pam.nix
@@ -1072,8 +1072,8 @@ in
     security.apparmor.includes."abstractions/pam" = let
       isEnabled = test: fold or false (map test (attrValues config.security.pam.services));
       in
-      lib.concatMapStringsSep "\n"
-        (name: "r ${config.environment.etc."pam.d/${name}".source},")
+      lib.concatMapStrings
+        (name: "r ${config.environment.etc."pam.d/${name}".source},\n")
         (attrNames config.security.pam.services) +
       ''
       mr ${getLib pkgs.pam}/lib/security/pam_filter/*,