diff --git a/nalgebra-glm/src/common.rs b/nalgebra-glm/src/common.rs
index 6a7aa8bf..6ab20371 100644
--- a/nalgebra-glm/src/common.rs
+++ b/nalgebra-glm/src/common.rs
@@ -507,7 +507,7 @@ pub fn sign<T: Number, const D: usize>(x: &TVec<T, D>) -> TVec<T, D> {
 ///
 /// This is useful in cases where you would want a threshold function with a smooth transition.
 /// This is equivalent to: `let result = clamp((x - edge0) / (edge1 - edge0), 0, 1); return t * t * (3 - 2 * t);` Results are undefined if `edge0 >= edge1`.
-pub fn smoothstep<T: Number>(edge0: T, edge1: T, x: T) -> T {
+pub fn smoothstep<T: RealNumber>(edge0: T, edge1: T, x: T) -> T {
     let _3 = T::from_subset(&3.0f64);
     let _2 = T::from_subset(&2.0f64);
     let t = na::clamp((x - edge0) / (edge1 - edge0), T::zero(), T::one());
diff --git a/nalgebra-glm/src/gtx/transform2.rs b/nalgebra-glm/src/gtx/transform2.rs
index 36d6fc73..f389e4b1 100644
--- a/nalgebra-glm/src/gtx/transform2.rs
+++ b/nalgebra-glm/src/gtx/transform2.rs
@@ -1,5 +1,6 @@
 use crate::aliases::{TMat3, TMat4, TVec2, TVec3};
 use crate::traits::Number;
+use crate::RealNumber;
 
 /// Build planar projection matrix along normal axis and right-multiply it to `m`.
 pub fn proj2d<T: Number>(m: &TMat3<T>, normal: &TVec2<T>) -> TMat3<T> {
@@ -26,7 +27,7 @@ pub fn proj<T: Number>(m: &TMat4<T>, normal: &TVec3<T>) -> TMat4<T> {
 }
 
 /// Builds a reflection matrix and right-multiply it to `m`.
-pub fn reflect2d<T: Number>(m: &TMat3<T>, normal: &TVec2<T>) -> TMat3<T> {
+pub fn reflect2d<T: RealNumber>(m: &TMat3<T>, normal: &TVec2<T>) -> TMat3<T> {
     let mut res = TMat3::identity();
 
     {
@@ -38,7 +39,7 @@ pub fn reflect2d<T: Number>(m: &TMat3<T>, normal: &TVec2<T>) -> TMat3<T> {
 }
 
 /// Builds a reflection matrix, and right-multiply it to `m`.
-pub fn reflect<T: Number>(m: &TMat4<T>, normal: &TVec3<T>) -> TMat4<T> {
+pub fn reflect<T: RealNumber>(m: &TMat4<T>, normal: &TVec3<T>) -> TMat4<T> {
     let mut res = TMat4::identity();
 
     {
diff --git a/nalgebra-glm/src/traits.rs b/nalgebra-glm/src/traits.rs
index 3d33fd1e..a09a95f2 100644
--- a/nalgebra-glm/src/traits.rs
+++ b/nalgebra-glm/src/traits.rs
@@ -2,7 +2,7 @@ use approx::AbsDiffEq;
 use num::{Bounded, Signed};
 
 use na::Scalar;
-use simba::scalar::{ClosedAdd, ClosedMul, ClosedSub, RealField, SupersetOf};
+use simba::scalar::{ClosedAdd, ClosedMul, ClosedSub, RealField};
 use std::cmp::PartialOrd;
 
 /// A number that can either be an integer or a float.
@@ -16,7 +16,6 @@ pub trait Number:
     + AbsDiffEq<Epsilon = Self>
     + Signed
     + Bounded
-    + SupersetOf<f64>
 {
 }
 
@@ -29,8 +28,7 @@ impl<
             + ClosedMul
             + AbsDiffEq<Epsilon = Self>
             + Signed
-            + Bounded
-            + SupersetOf<f64>,
+            + Bounded,
     > Number for T
 {
 }