diff --git a/Eigen/src/Sparse/CholmodSupport.h b/Eigen/src/Sparse/CholmodSupport.h
index f451dbcc0..9a13ae883 100644
--- a/Eigen/src/Sparse/CholmodSupport.h
+++ b/Eigen/src/Sparse/CholmodSupport.h
@@ -94,7 +94,7 @@ SparseMatrix<Scalar,Flags> SparseMatrix<Scalar,Flags>::Map(cholmod_sparse& cm)
                                 reinterpret_cast<Scalar*>(cm.x),
                                 res.m_outerIndex[cm.ncol]);
   res.m_data.swap(data);
-  // res.markAsRValue();
+  res.markAsRValue();
   return res;
 }
 
diff --git a/Eigen/src/Sparse/TaucsSupport.h b/Eigen/src/Sparse/TaucsSupport.h
index 26bf19c5b..55d2892ec 100644
--- a/Eigen/src/Sparse/TaucsSupport.h
+++ b/Eigen/src/Sparse/TaucsSupport.h
@@ -74,7 +74,7 @@ SparseMatrix<Scalar,Flags> SparseMatrix<Scalar,Flags>::Map(taucs_ccs_matrix& tau
                                 reinterpret_cast<Scalar*>(taucsMat.values.v),
                                 taucsMat.colptr[taucsMat.n]);
   res.m_data.swap(data);
-  // res.markAsRValue();
+  res.markAsRValue();
   return res;
 }