diff --git a/Stream_support/include/CGAL/IO/write_vtk.h b/Stream_support/include/CGAL/IO/write_vtk.h
index 5d702e27d92..b55df59c17e 100644
--- a/Stream_support/include/CGAL/IO/write_vtk.h
+++ b/Stream_support/include/CGAL/IO/write_vtk.h
@@ -21,6 +21,9 @@
 
 #ifndef CGAL_WRITE_VTK_IO_H
 #define CGAL_WRITE_VTK_IO_H
+
+#include <CGAL/license/Polyhedron.h>
+
 #include <fstream>
 #include <vector>
 template <class FT>