diff --git a/lib/obj.js b/lib/obj.js
index 3efcb8f..aa868f9 100644
--- a/lib/obj.js
+++ b/lib/obj.js
@@ -152,7 +152,7 @@ function processObj(objFile, info, materials, images, done) {
     var uvPattern = /vt( +[\d|\.|\+|\-|e|E]+)( +[\d|\.|\+|\-|e|E]+)/;
 
     // f vertex vertex vertex ...
-    var facePattern1 = /f( +-?\d+)( +-?\d+)( +-?\d+)( +-?\d+)?/;
+    var facePattern1 = /f( +-?\d+)\/?( +-?\d+)\/?( +-?\d+)\/?( +-?\d+)?\/?/;
 
     // f vertex/uv vertex/uv vertex/uv ...
     var facePattern2 = /f( +(-?\d+)\/(-?\d+)\/?)( +(-?\d+)\/(-?\d+)\/?)( +(-?\d+)\/(-?\d+)\/?)( +(-?\d+)\/(-?\d+)\/?)?/;