diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h
index e1f11ec8554..ba90c8e4031 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h
@@ -26,6 +26,8 @@
 #include <CGAL/AABB_tree.h>
 #include <CGAL/AABB_traits.h>
 #include <CGAL/AABB_triangle_primitive.h>
+#include <CGAL/utility.h>
+#include <boost/foreach.hpp>
 
 /// \cond SKIP_IN_MANUAL