diff --git a/lib/loadObj.js b/lib/loadObj.js
index fb810a4..12a3059 100644
--- a/lib/loadObj.js
+++ b/lib/loadObj.js
@@ -502,7 +502,7 @@ function getMtlPaths(mtllibLine) {
     var length = splits.length;
     var startIndex = 0;
     for (var i = 0; i < length; ++i) {
-        if (path.extname(splits[i]) === '') {
+        if (path.extname(splits[i]) !== '.mtl') {
             continue;
         }
         var mtlPath = splits.slice(startIndex, i + 1).join(' ');