diff --git a/Triangulation_3/include/CGAL/Triangulation_3/internal/Triangulation_segment_traverser_3_impl.h b/Triangulation_3/include/CGAL/Triangulation_3/internal/Triangulation_segment_traverser_3_impl.h
index fd93f79492df..ca9a4f73f8bf 100644
--- a/Triangulation_3/include/CGAL/Triangulation_3/internal/Triangulation_segment_traverser_3_impl.h
+++ b/Triangulation_3/include/CGAL/Triangulation_3/internal/Triangulation_segment_traverser_3_impl.h
@@ -13,6 +13,7 @@
 #define CGAL_TRIANGULATION_SEGMENT_TRAVERSER_3_IMPL_H
 
 #include <CGAL/license/Triangulation_3.h>
+
 #include <CGAL/assertions.h>
 
 namespace CGAL {