diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h
index 0a02e81cbe2..317d2c72d20 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h
@@ -24,6 +24,7 @@
 #include <boost/graph/graph_traits.hpp>
 #include <boost/foreach.hpp>
 #include <boost/type_traits/is_same.hpp>
+#include <boost/range/size.hpp>
 
 #include <CGAL/Polygon_mesh_processing/internal/named_function_params.h>
 #include <CGAL/Polygon_mesh_processing/internal/named_params_helper.h>