diff --git a/Surface_mesh_segmentation/include/CGAL/internal/auxiliary/graph.h b/Surface_mesh_segmentation/include/CGAL/internal/auxiliary/graph.h
index 862fffa9af7..02803bd9eb8 100644
--- a/Surface_mesh_segmentation/include/CGAL/internal/auxiliary/graph.h
+++ b/Surface_mesh_segmentation/include/CGAL/internal/auxiliary/graph.h
@@ -1748,4 +1748,6 @@ inline Graph::termtype Graph::what_segment(node_id i)
   return SINK;
 }
 
+#undef last_node
+
 #endif