diff --git a/src/traits/operations.rs b/src/traits/operations.rs
index d0cae210..fa332c03 100644
--- a/src/traits/operations.rs
+++ b/src/traits/operations.rs
@@ -1,6 +1,6 @@
 //! Low level operations on vectors and matrices.
 
-use std::num::{Float, SignedInt};
+use num::{Float, Signed};
 use std::ops::Mul;
 use std::cmp::Ordering;
 use traits::structure::SquareMat;