diff --git a/src/angle.rs b/src/angle.rs
index 900ac67..7ee16b7 100644
--- a/src/angle.rs
+++ b/src/angle.rs
@@ -21,7 +21,6 @@ use std::ops::*;
 
 use rand::{Rand, Rng};
 use rand::distributions::range::SampleRange;
-use num_traits::Float;
 use num_traits::cast;
 
 use structure::*;
diff --git a/src/projection.rs b/src/projection.rs
index 110e347..5bbac10 100644
--- a/src/projection.rs
+++ b/src/projection.rs
@@ -13,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use num_traits::{Zero, One};
+use num_traits::{Zero};
 use num_traits::cast;
 
 use structure::Angle;
diff --git a/src/quaternion.rs b/src/quaternion.rs
index 4bd39a6..8f72c88 100644
--- a/src/quaternion.rs
+++ b/src/quaternion.rs
@@ -17,7 +17,6 @@ use std::mem;
 use std::ops::*;
 
 use rand::{Rand, Rng};
-use num_traits::Float;
 use num_traits::cast;
 
 use structure::*;