Graphical modeler in QGIS. I can't find a model

I'm a doing a tutorial for QGIS and at one point I have to use 'Join attributes by location' model but I do not find it in the Graphical modeler. Does it have to be there? I have to download it from somewhere?

I am using QGIS 2.8.1.

Any help would be useful. Thx.