Błąd podczas kompilacji programu w Lazarus

Próbuję skompilować ten kod

unit Unit1;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, ExtCtrls,
  LazHelpHTML, Buttons, Grids, MaskEdit, CheckLst, StdCtrls, Dos;

type

  { TForm1 }

  TForm1 = class(TForm)
    Update_1: TBitBtn;
    Update_2: TBitBtn;
    Update_3: TBitBtn;
    Update_4: TBitBtn;
    Microsoft_Framework_3_5_1: TStaticText;
    Microsoft_Framework_4_5: TStaticText;
    Microsoft_Framework_4_6: TStaticText;
    Windows_Update: TStaticText;
    procedure Update_1Click(Sender: TObject);
    procedure ControlBar1Click(Sender: TObject);
    procedure MaskEdit1Change(Sender: TObject);
    procedure Update_2Click(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.lfm}

{ TForm1 }

procedure TForm1.ControlBar1Click(Sender: TObject);
begin

end;

procedure TForm1.Update_1Click(Sender: TObject);
begin
  exec('cmd','')
end;

procedure TForm1.Update_2Click(Sender: TObject);
begin
  exec('cmd','')
end;

procedure TForm1.Update_3Click(Sender: TObject);
begin
  exec('cmd','')
end;

procedure TForm1.MaskEdit1Change(Sender: TObject);
begin

end;

end.

Otrzymuję bład Compile

Project, Target: project1.exe: Exit code 1, Errors: 1
unit1.pas(58,18) Error: method identifier expected

Gdzie masz w zadeklarowane Update_3Click?