Broken object, 2 faces shaded and the rest are wireframe

This object has two faces shaded and the rest are wireframe. Any idea how I can fix it?

I guess you have hidden some faces by accident with pressing H.
Press ALT+H to unhide the other faces.

You might try checking the normals too. The normals might be facing wrong direction.

Thank you for your replies.
I had to rebuild the face, though there was probably an easier way to do it too.