diff --git a/node/node.go b/node/node.go
index 44a49f131f..db35aa8496 100644
--- a/node/node.go
+++ b/node/node.go
@@ -1560,7 +1560,7 @@ func (app *App) grpcService(svc grpcserver.Service, lg log.Log) (grpcserver.Serv
 			app.clock.GenesisTime(),
 			app.Config.Genesis.GenesisID(),
 			app.Config.LayerDuration,
-			app.postSupervisor.Config().LabelsPerUnit)
+			app.Config.POST.LabelsPerUnit)
 		app.grpcServices[svc] = service
 		return service, nil
 	case v2alpha1.Node: