diff --git a/src/diagrams/flowchart/dagre-d3.js b/src/diagrams/flowchart/dagre-d3.js
new file mode 100644
index 000000000..a3c0b472a
--- /dev/null
+++ b/src/diagrams/flowchart/dagre-d3.js
@@ -0,0 +1,15 @@
+/* global window */
+
+var dagreD3;
+
+if (require) {
+  try {
+    dagreD3 = require("dagre-d3");
+  } catch (e) {}
+}
+
+if (!dagreD3) {
+  dagreD3 = window.dagreD3;
+}
+
+module.exports = dagreD3;