1 files changed, 3 insertions, 6 deletions
diff --git a/Eigen/src/Geometry/Quaternion.h b/Eigen/src/Geometry/Quaternion.h
index 73b28ae34..7b2c4d89d 100644
--- a/Eigen/src/Geometry/Quaternion.h
+++ b/Eigen/src/Geometry/Quaternion.h
@@ -198,6 +198,9 @@ class QuaternionBase : public RotationBase<Derived, 3>
 #ifdef EIGEN_QUATERNIONBASE_PLUGIN
 # include EIGEN_QUATERNIONBASE_PLUGIN
 #endif
+protected:
+  EIGEN_DEFAULT_COPY_CONSTRUCTOR(QuaternionBase)
+  EIGEN_DEFAULT_EMPTY_CONSTRUCTOR_AND_DESTRUCTOR(QuaternionBase)
 };
 
 /***************************************************************************
@@ -304,12 +307,6 @@ public:
     m_coeffs = std::move(other.coeffs());
     return *this;
   }
-
-  // And now because we declared a constructor, we don't get an implicit copy constructor. Say we want one.
-  /** Default copy constructor */
-  EIGEN_DEVICE_FUNC Quaternion(const Quaternion& other)
-    : m_coeffs(other.coeffs())
-  {}
 #endif
 
   EIGEN_DEVICE_FUNC static Quaternion UnitRandom();