diff --git a/cmd/digraph/digraph.go b/cmd/digraph/digraph.go
index 9d42b83c3d..ff2399fea0 100644
--- a/cmd/digraph/digraph.go
+++ b/cmd/digraph/digraph.go
@@ -526,7 +526,7 @@ func digraph(cmd string, args []string) error {
 			}
 		}
 
-		edgesSorted := make([]string, len(edges))
+		edgesSorted := make([]string, 0, len(edges))
 		for e := range edges {
 			edgesSorted = append(edgesSorted, e)
 		}