diff --git a/Eigen/src/Core/Product.h b/Eigen/src/Core/Product.h
index 15f44de89..9e1875941 100644
--- a/Eigen/src/Core/Product.h
+++ b/Eigen/src/Core/Product.h
@@ -135,8 +135,8 @@ struct ProductReturnType
 template<typename Lhs, typename Rhs>
 struct ProductReturnType<Lhs,Rhs,UnrolledProduct>
 {
-  typedef typename ei_nested<Lhs,Rhs::ColsAtCompileTime>::type LhsNested;
-  typedef typename ei_nested<Rhs,Lhs::RowsAtCompileTime>::type RhsNested;
+  typedef typename ei_nested<Lhs, Rhs::ColsAtCompileTime, ei_plain_matrix_type<Lhs> >::type LhsNested;
+  typedef typename ei_nested<Rhs, Lhs::RowsAtCompileTime, ei_plain_matrix_type<Rhs> >::type RhsNested;
   typedef GeneralProduct<LhsNested, RhsNested, UnrolledProduct> Type;
 };