diff --git a/src/geometry/quaternion.rs b/src/geometry/quaternion.rs
index 0d5275dc..4b0ce6b3 100644
--- a/src/geometry/quaternion.rs
+++ b/src/geometry/quaternion.rs
@@ -156,7 +156,7 @@ impl<N: Real> Quaternion<N> {
     /// let inv_q = q.try_inverse();
     ///
     /// assert!(inv_q.is_some());
-    /// assert_relative_eq!(inv_q.into_inner() * q, Quaternion::identity());
+    /// assert_relative_eq!(inv_q.unwrap() * q, Quaternion::identity());
     ///
     /// //Non-invertible case
     /// let q = Quaternion::new(0.0, 0.0, 0.0, 0.0);
@@ -914,7 +914,7 @@ impl<N: Real> UnitQuaternion<N> {
     /// let angle = 1.2;
     /// let rot = UnitQuaternion::from_axis_angle(&axis, angle);
     /// let pow = rot.powf(2.0);
-    /// assert_relative_eq!(pow.axis().into_inner(), axis, epsilon = 1.0e-6);
+    /// assert_relative_eq!(pow.axis().unwrap(), axis, epsilon = 1.0e-6);
     /// assert_eq!(pow.angle(), 2.4);
     /// ```
     #[inline]
diff --git a/src/geometry/quaternion_construction.rs b/src/geometry/quaternion_construction.rs
index f99c5ec6..e48bfaae 100644
--- a/src/geometry/quaternion_construction.rs
+++ b/src/geometry/quaternion_construction.rs
@@ -176,7 +176,7 @@ impl<N: Real> UnitQuaternion<N> {
     /// let vec = Vector3::new(4.0, 5.0, 6.0);
     /// let q = UnitQuaternion::from_axis_angle(&axis, angle);
     ///
-    /// assert_eq!(q.axis().into_inner(), axis);
+    /// assert_eq!(q.axis().unwrap(), axis);
     /// assert_eq!(q.angle(), angle);
     /// assert_relative_eq!(q * pt, Point3::new(6.0, 5.0, -4.0), epsilon = 1.0e-6);
     /// assert_relative_eq!(q * vec, Vector3::new(6.0, 5.0, -4.0), epsilon = 1.0e-6);
@@ -244,7 +244,7 @@ impl<N: Real> UnitQuaternion<N> {
     /// let rot = Rotation3::from_axis_angle(&axis, angle);
     /// let q = UnitQuaternion::from_rotation_matrix(&rot);
     /// assert_relative_eq!(q.to_rotation_matrix(), rot, epsilon = 1.0e-6);
-    /// assert_relative_eq!(q.axis().into_inner(), rot.axis().into_inner(), epsilon = 1.0e-6);
+    /// assert_relative_eq!(q.axis().unwrap(), rot.axis().unwrap(), epsilon = 1.0e-6);
     /// assert_relative_eq!(q.angle(), rot.angle(), epsilon = 1.0e-6);
     /// ```
     #[inline]
@@ -306,7 +306,7 @@ impl<N: Real> UnitQuaternion<N> {
     /// # use nalgebra::{Vector3, UnitQuaternion};
     /// let a = Vector3::new(1.0, 2.0, 3.0);
     /// let b = Vector3::new(3.0, 1.0, 2.0);
-    /// let q = UnitQuaternion::rotation_between(&a, &b).into_inner();
+    /// let q = UnitQuaternion::rotation_between(&a, &b).unwrap();
     /// assert_relative_eq!(q * a, b);
     /// assert_relative_eq!(q.inverse() * b, a);
     /// ```
@@ -329,8 +329,8 @@ impl<N: Real> UnitQuaternion<N> {
     /// # use nalgebra::{Vector3, UnitQuaternion};
     /// let a = Vector3::new(1.0, 2.0, 3.0);
     /// let b = Vector3::new(3.0, 1.0, 2.0);
-    /// let q2 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.2).into_inner();
-    /// let q5 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.5).into_inner();
+    /// let q2 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.2).unwrap();
+    /// let q5 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.5).unwrap();
     /// assert_relative_eq!(q2 * q2 * q2 * q2 * q2 * a, b, epsilon = 1.0e-6);
     /// assert_relative_eq!(q5 * q5 * a, b, epsilon = 1.0e-6);
     /// ```
@@ -365,7 +365,7 @@ impl<N: Real> UnitQuaternion<N> {
     /// # use nalgebra::{Unit, Vector3, UnitQuaternion};
     /// let a = Unit::new_normalize(Vector3::new(1.0, 2.0, 3.0));
     /// let b = Unit::new_normalize(Vector3::new(3.0, 1.0, 2.0));
-    /// let q = UnitQuaternion::rotation_between(&a, &b).into_inner();
+    /// let q = UnitQuaternion::rotation_between(&a, &b).unwrap();
     /// assert_relative_eq!(q * a, b);
     /// assert_relative_eq!(q.inverse() * b, a);
     /// ```
@@ -391,8 +391,8 @@ impl<N: Real> UnitQuaternion<N> {
     /// # use nalgebra::{Unit, Vector3, UnitQuaternion};
     /// let a = Unit::new_normalize(Vector3::new(1.0, 2.0, 3.0));
     /// let b = Unit::new_normalize(Vector3::new(3.0, 1.0, 2.0));
-    /// let q2 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.2).into_inner();
-    /// let q5 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.5).into_inner();
+    /// let q2 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.2).unwrap();
+    /// let q5 = UnitQuaternion::scaled_rotation_between(&a, &b, 0.5).unwrap();
     /// assert_relative_eq!(q2 * q2 * q2 * q2 * q2 * a, b, epsilon = 1.0e-6);
     /// assert_relative_eq!(q5 * q5 * a, b, epsilon = 1.0e-6);
     /// ```