diff --git a/BGL/doc/BGL/Concepts/EdgeListGraph.h b/BGL/doc/BGL/Concepts/EdgeListGraph.h
index 7d7980aa172..3de2fd15a6b 100644
--- a/BGL/doc/BGL/Concepts/EdgeListGraph.h
+++ b/BGL/doc/BGL/Concepts/EdgeListGraph.h
@@ -33,7 +33,7 @@ edges(const EdgeListGraph& g);
   This is the case for implementations only marking edges deleted in the edge container.
  */
 template <typename EdgeListGraph>
-boost::graph_traits<EdgeListGraph>::ver_size_type
+boost::graph_traits<EdgeListGraph>::edges_size_type
 num_edges(const EdgeListGraph& g);
 
 
diff --git a/BGL/doc/BGL/Concepts/VertexListGraph.h b/BGL/doc/BGL/Concepts/VertexListGraph.h
index e24f6c55404..6d58aa3bfc3 100644
--- a/BGL/doc/BGL/Concepts/VertexListGraph.h
+++ b/BGL/doc/BGL/Concepts/VertexListGraph.h
@@ -33,6 +33,6 @@ vertices(const VertexListGraph& g);
   This is the case for implementations only marking vertices deleted in the vertex container.
  */
 template <typename VertexListGraph>
-boost::graph_traits<VertexListGraph>::ver_size_type
+boost::graph_traits<VertexListGraph>::vertices_size_type
 num_vertices(const VertexListGraph& g);