AVOID_DIST_MAX is the minimum value updated to 1m?

the minimum distance for the parameter ‘AVOID_DIST_MAX’ is given as 1m in the below website
http://ardupilot.org/copter/docs/parameters.html#avoid-dist-max
I am using the latest stable version 3.6.11 arducopter. In my parameter list it has 3m as minimum !!!