diff --git a/edmonds.cpp b/edmonds.cpp
index e63a8a1..7cfe584 100644
--- a/edmonds.cpp
+++ b/edmonds.cpp
@@ -30,13 +30,11 @@ std::vector<NodeId> path_to_forest_root(Graph const & graph, NodeId id)
    return retval;
 }
 
-
-
 Graph maximum_matching_from_initial_matching(Graph & graph)
 {
    graph.reset_forest();
    for(NodeId id = 0; id < graph.num_nodes(); ++id) {
-      if (graph.is_out_of_forest(id))
+      if (graph.is_outer(id))
       {
          for(NodeId neighbor_id : graph.node(id).neighbors())
          {