diff --git a/Nef_S2/include/CGAL/Nef_polyhedron_S2.h b/Nef_S2/include/CGAL/Nef_polyhedron_S2.h
index 119072e6845..8d7c1640eda 100644
--- a/Nef_S2/include/CGAL/Nef_polyhedron_S2.h
+++ b/Nef_S2/include/CGAL/Nef_polyhedron_S2.h
@@ -41,6 +41,7 @@
 
 #include <boost/random/linear_congruential.hpp>
 #include <boost/random/uniform_real.hpp>
+#include <boost/random/variate_generator.hpp>
 
 #undef CGAL_NEF_DEBUG
 #define CGAL_NEF_DEBUG 53