diff --git a/path/spanning_tree.go b/path/spanning_tree.go
index 5fec4cad..df466e5d 100644
--- a/path/spanning_tree.go
+++ b/path/spanning_tree.go
@@ -132,7 +132,7 @@ func (q *primQueue) update(u, v graph.Node, key float64) {
 	heap.Fix(q, i)
 }
 
-// UndirectedWeightLister is an undirected graph that returns distinct edge weights and
+// UndirectedWeightLister is an undirected graph that returns edge weights and
 // the set of edges in the graph.
 type UndirectedWeightLister interface {
 	UndirectedWeighter