diff --git a/Surface_mesh_simplification/include/CGAL/Modifiable_priority_queue.h b/STL_Extension/include/CGAL/Modifiable_priority_queue.h
similarity index 100%
rename from Surface_mesh_simplification/include/CGAL/Modifiable_priority_queue.h
rename to STL_Extension/include/CGAL/Modifiable_priority_queue.h