I just had some entry doors installed and it turns out that the door knobs are the lock-out kind. By that I mean that you don't have to unlock the knobs to open the door from the inside. If you happen to forget that they're locked, you can walk out, close the door, and find you're locked out.

Is there any way to modify this sort of knob so that it requires actual unlocking before going out? I'd hate to have to replace both knobs.

Paul