openssl/des.h error

Hello, I was trying to install freeradius 1.0.1 but i failed. The x99.h file contains the line : include<openssl/des.h> and unfortunately there is no such a file and the compilation stops with error. I have suse linux 7.2 and it has openssl.exe but i cant find anywhere the des.h file. Note that the new freeradius 1.1.0 and 1.1.1 doesnt include the x99.h file neither its folder that contains it (rlm_x99_token) and i managed to install these newer versions. However, i have to install the older version. Any suggestions... Thank you chris