diff --git a/index.js b/index.js
index 9c13732..8d4ceda 100644
--- a/index.js
+++ b/index.js
@@ -3,6 +3,7 @@ var inherits = require('inherits')
 var createIndices = require('quad-indices')
 var buffer = require('three-buffer-vertex-data')
 var assign = require('object-assign')
+var THREE = require('three')
 
 var vertices = require('./lib/vertices')
 var utils = require('./lib/utils')