Fonts in xterm

I installed Trisquel at home and at work. For some reason the font for xterm can't be used on medium size at home while the exact same version of Trisquel at work can load the right font. This is the font i can't load at home: -*-fixed-medium-r-normal-*-15-120-*-*-*-*-*-*

Does anybody know what font package i need to install? Or is it a setting somewhere?