diff --git a/Solver_interface/include/CGAL/Eigen_sparse_matrix.h b/Solver_interface/include/CGAL/Eigen_sparse_matrix.h
index 83622ad9058..3a1c8d552e2 100644
--- a/Solver_interface/include/CGAL/Eigen_sparse_matrix.h
+++ b/Solver_interface/include/CGAL/Eigen_sparse_matrix.h
@@ -91,7 +91,7 @@ public:
   {
     CGAL_precondition(rows > 0);
     CGAL_precondition(columns > 0);
-    if(m_is_symmetric)
+    if(is_symmetric)
     {
       CGAL_precondition(rows == columns);
     }