Expected class-name before '{' token

[imagiro1]

I've working on my first project and I've hit a speed bump. When building, I get this error message. Expected class-name before '{' token in mainwindow.h line 8.

Here is mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include "ui_mainwindow.h"
 
 
class MainWindow : public QWidget, private Ui::MainWindowDLG
{
    Q_OBJECT
 
public:
  MainWindow(QWidget *parent = 0);
 
public slots:
 void display_pic();
 
};
 
#endif

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include "ui_mainwindow.h"


class MainWindow : public QWidget, private Ui::MainWindowDLG
{
    Q_OBJECT

public:
  MainWindow(QWidget *parent = 0);

public slots:
 void display_pic();

};

#endif

To copy to clipboard, switch view to plain text mode 

I know it's got to be something simple I am overlooking. Thanks in advance.