Use StandardNormal on rand::distributions.
@@ -5,7 +5,7 @@ use quickcheck::{Arbitrary, Gen};
use num::{Bounded, One, Zero};
#[cfg(feature = "std")]
-use rand::{self, StandardNormal};
+use rand::{self, distributions::StandardNormal};
use rand::distributions::{Distribution, Standard};
use rand::Rng;
use std::iter;
