diff --git a/src/dagre/position/index.js b/src/dagre/position/index.js
index d02ef78..62008d8 100644
--- a/src/dagre/position/index.js
+++ b/src/dagre/position/index.js
@@ -8,7 +8,7 @@ function position(g) {
   g = util.asNonCompoundGraph(g);
 
   positionY(g);
-  _.forEach(positionX(g), function (x, v) {
+  _.forOwn(positionX(g), function (x, v) {
     g.node(v).x = x;
   });
 }