diff --git a/Mesh_2/include/CGAL/Mesh_2/Do_not_refine_edges.h b/Mesh_2/include/CGAL/Mesh_2/Do_not_refine_edges.h
index 13539047dc1..3acbe7e4dfe 100644
--- a/Mesh_2/include/CGAL/Mesh_2/Do_not_refine_edges.h
+++ b/Mesh_2/include/CGAL/Mesh_2/Do_not_refine_edges.h
@@ -80,7 +80,7 @@ public:
       const Face_handle& fh = eit->first;
       const int& i = eit->second;
 
-      if(fh->is_constrained(i) && !is_locally_conform(this->tr, fh, i, p))
+      if(fh->is_constrained(i) && !this->is_locally_conform(this->tr, fh, i, p))
       {
         return CONFLICT_AND_ELEMENT_SHOULD_BE_DROPPED;
       }