c3-lang/libtommath

diff --git a/demo/test.c b/demo/test.c
index 4e5339e..5ffc908 100644
--- a/demo/test.c
+++ b/demo/test.c
@@ -129,7 +129,7 @@ static int test_mp_rand(void)
          break;
       }
    }
-   mp_rand_source(NULL);
+   mp_rand_source(s_mp_rand_jenkins);
    mp_clear_multi(&a, &b, NULL);
    return err == MP_OKAY ? EXIT_SUCCESS : EXIT_FAILURE;
 }