Arduino compatibility

[juvebogdancr7]

Hello,

Is it possible to use this library on Arduino Mega 2560? I am able to run the example ino file but when I tried this:
uECC_Curve curve;
curve = uECC_secp160r1();
wordcount_t num_words = curve->num_words;

I got the error: error: invalid use of incomplete type 'const struct uECC_Curve_t'

As for the includes I tried these:
#include "uECC.h"
#include "uECC_vli.h"

Do you have any advice on this?