I play bass in a church band, and my drummer has difficulty keeping time. He does okay untill he decides to do a roll then he rolls for a measure and a half instead of one or something similar. I try to stay on but the rest of the band will just fumble to keep with the drummer. So i look like the guy who's off. I've really simplified some of my bass lines to help him but it doesn't seem to help. How can I go about communicating to this guy how to stay on.

