diff --git a/Eigen/src/Core/CwiseUnaryOp.h b/Eigen/src/Core/CwiseUnaryOp.h
index 5915dad54..7289952ed 100644
--- a/Eigen/src/Core/CwiseUnaryOp.h
+++ b/Eigen/src/Core/CwiseUnaryOp.h
@@ -190,7 +190,7 @@ template<typename Derived>
 template<typename NewType>
 EIGEN_STRONG_INLINE
 typename ei_cast_return_type<
-            const Derived&,
+            Derived,
             const CwiseUnaryOp<ei_scalar_cast_op<typename ei_traits<Derived>::Scalar, NewType>, Derived>
           >::type
 MatrixBase<Derived>::cast() const
diff --git a/Eigen/src/Core/MatrixBase.h b/Eigen/src/Core/MatrixBase.h
index 7eb7c1eff..73fe862f4 100644
--- a/Eigen/src/Core/MatrixBase.h
+++ b/Eigen/src/Core/MatrixBase.h
@@ -505,7 +505,7 @@ template<typename Derived> class MatrixBase
 
     template<typename NewType>
     typename ei_cast_return_type<
-        const Derived&,
+        Derived,
         const CwiseUnaryOp<ei_scalar_cast_op<typename ei_traits<Derived>::Scalar, NewType>, Derived>
       >::type
     cast() const;