Door lock issue

[Vonhoodnik]

First off thank you all for all the valuable info on this site. It sure has made my build go a lot smoother. Y'all are the best. My problem is every time i slam my drivers door shut it locks itself. If i barely click it back into place it wont lock. So my guess is when i slam the door the weight of the inside handle must drop it to the locked position. What do i have to replace or is there some sort of adjustment to get it to quit? its on a 64

[61K10]

I would pull the door panel and take a look. stuff is pretty simple. Take some pics and re-post the pics. With some pics somebody will help.