Wrong version shown in 3.81 release?

[matrix2020]

I am running Centos 6, so I decided to obtain the sources for latest 3.x release and compile it (no way to obtain the boost libs required for later versions).
Strangely enough, no matter how I get the sources (git, zip, tgz) the resulting binary shows V3.5876 as its verison.
Build Hash: b97777b
Build Date: 2016-11-09 13:33:42
and not the right version which I imagine should be 3.8153?
Is it just a typo in sources, or am I actually running the wrong version?
If so, how can I get the right sources to compile me 3.8153?

[matrix2020]

OK, so I read sources a bit and indeed,it looks like the devs forgot to update the appversion.default between the versions.
In fact the previous release (the 5877) also has 5876 as the build number and the same is the case for 8153.
Just for the sake of it, how can I fix it the appversion.default to match the actual version and build number?