diff --git a/Alpha_shapes_2/include/CGAL/Alpha_shape_2.h b/Alpha_shapes_2/include/CGAL/Alpha_shape_2.h
index e68ea4c16c2..dd3bdc34c31 100644
--- a/Alpha_shapes_2/include/CGAL/Alpha_shape_2.h
+++ b/Alpha_shapes_2/include/CGAL/Alpha_shape_2.h
@@ -663,7 +663,7 @@ private:
 		Marked_face_set& marked_face_set, 
 		const Coord_type alpha) const;
 
-  class Line_face_circulator;
+//  class Line_face_circulator;
 
   //----------------------------------------------------------------------