diff --git a/Orthtree/include/CGAL/Orthtree/Node.h b/Orthtree/include/CGAL/Orthtree/Node.h
index bcfa9229f6e..b06d9469cd5 100644
--- a/Orthtree/include/CGAL/Orthtree/Node.h
+++ b/Orthtree/include/CGAL/Orthtree/Node.h
@@ -14,6 +14,7 @@
 
 #include <CGAL/license/Orthtree.h>
 
+#include <CGAL/Orthtree.h>
 
 #include <boost/range/iterator_range.hpp>