diff --git a/nixos/doc/manual/configuration.xml b/nixos/doc/manual/configuration.xml
index e6d7dee251a..da08098ddda 100644
--- a/nixos/doc/manual/configuration.xml
+++ b/nixos/doc/manual/configuration.xml
@@ -1025,7 +1025,6 @@ users.extraUsers.alice =
     home = "/home/alice";
     description = "Alice Foobar";
     extraGroups = [ "wheel" ];
-    isSystemUser = false;
     useDefaultShell = true;
     openssh.authorizedKeys.keys = [ "ssh-dss AAAAB3Nza... alice@foobar" ];
   };
diff --git a/nixos/modules/profiles/demo.nix b/nixos/modules/profiles/demo.nix
index 396dcf6c5d3..605cc6aad1d 100644
--- a/nixos/modules/profiles/demo.nix
+++ b/nixos/modules/profiles/demo.nix
@@ -11,6 +11,6 @@
       createHome = true;
       useDefaultShell = true;
       password = "demo";
-      isSystemUser = false;
+      uid = 1000;
     };
 }
diff --git a/nixos/tests/common/user-account.nix b/nixos/tests/common/user-account.nix
index 8157cf8d263..0239a3c4d08 100644
--- a/nixos/tests/common/user-account.nix
+++ b/nixos/tests/common/user-account.nix
@@ -7,5 +7,6 @@
       createHome = true;
       useDefaultShell = true;
       password = "foobar";
+      uid = 1000;
     };
 }