diff --git a/AABB_tree/include/CGAL/AABB_halfedge_graph_segment_primitive.h b/AABB_tree/include/CGAL/AABB_halfedge_graph_segment_primitive.h
index 375a6de9ed8..6d1e9c6e538 100644
--- a/AABB_tree/include/CGAL/AABB_halfedge_graph_segment_primitive.h
+++ b/AABB_tree/include/CGAL/AABB_halfedge_graph_segment_primitive.h
@@ -135,7 +135,7 @@ public:
   /*!
   Id type:
   - `boost::graph_traits<HalfedgeGraph>::%edge_descriptor` if `OneHalfedgeGraphPerTree` is `Tag_true`
-  - `std::pair<boost::graph_traits<HalfedgeGraph>::edge_descriptor, const HalfedgeGraph*>` if `OneHalfedgeGraphPerTree` is `Tag_false`
+  - `std::pair<boost::graph_traits<HalfedgeGraph>::%edge_descriptor, const HalfedgeGraph*>` if `OneHalfedgeGraphPerTree` is `Tag_false`
   */
   unspecified_type Id;
   /// @}
@@ -211,4 +211,3 @@ public:
 #include <CGAL/enable_warnings.h>
 
 #endif // CGAL_AABB_HALFEDGE_GRAPH_SEGMENT_PRIMITIVE_H
-