diff --git a/include/boost/graph/graph_traits.hpp b/include/boost/graph/graph_traits.hpp
index 38a791fc..a1c27483 100644
--- a/include/boost/graph/graph_traits.hpp
+++ b/include/boost/graph/graph_traits.hpp
@@ -170,6 +170,7 @@ namespace boost {
     struct distributed_graph_tag { };
     struct distributed_vertex_list_graph_tag { };
     struct distributed_edge_list_graph_tag { };
+#define BOOST_GRAPH_SEQUENTIAL_TRAITS_DEFINES_DISTRIBUTED_TAGS // Disable these from external versions of PBGL
 
     /** @name Traversal Category Traits
      * These traits classify graph types by their supported methods of