Boom attachment - quick fix

When I bought the boat the boom was held to the gooseneck by one screw instead of three (one each side, one underneath). Although it looks like it's about to come apart (see picture below), with the sail and rigging attached it wasn't a critical fix but it needed to be done before any rough weather sailing.

The fix - replace the missing screws and add two rivets to each side for that added bit of security.