diff --git a/cmd/internal/markov/absorbing.go b/cmd/internal/markov/absorbing.go
index 2309eda..d11797f 100644
--- a/cmd/internal/markov/absorbing.go
+++ b/cmd/internal/markov/absorbing.go
@@ -46,7 +46,7 @@ func (g *AbsorbingMarkovChain) IsValid() bool {
 	return true
 }
 
-func (g *AbsorbingMarkovChain) outWeightSum(u *node) float64 {
+func (g *AbsorbingMarkovChain) outWeightSum(u graph.Node) float64 {
 	sum := 0.0
 	for nodes := g.From(u.ID()); nodes.Next(); {
 		v := nodes.Node()