diff --git a/lib/loadObj.js b/lib/loadObj.js
index 290a087..a714457 100644
--- a/lib/loadObj.js
+++ b/lib/loadObj.js
@@ -502,7 +502,7 @@ function loadObj(objPath, options) {
             uvs = undefined;
 
             // Load materials and textures
-            return finishLoading(nodes, mtlPaths, objPath, options);
+            return finishLoading(nodes, mtlPaths, objPath, defined(activeMaterial), options);
         });
 }
 
@@ -523,7 +523,7 @@ function getMtlPaths(mtllibLine) {
     return mtlPaths;
 }
 
-function finishLoading(nodes, mtlPaths, objPath, options) {
+function finishLoading(nodes, mtlPaths, objPath, usesMaterials, options) {
     nodes = cleanNodes(nodes);
     if (nodes.length === 0) {
         throw new RuntimeError(objPath + ' does not have any geometry data');
@@ -531,7 +531,9 @@ function finishLoading(nodes, mtlPaths, objPath, options) {
     var name = path.basename(objPath, path.extname(objPath));
     return loadMtls(mtlPaths, objPath, options)
         .then(function(materials) {
-            assignDefaultMaterial(nodes, materials);
+            if (materials.length > 0 && !usesMaterials) {
+                assignDefaultMaterial(nodes, materials, usesMaterials);
+            }
             return {
                 nodes : nodes,
                 materials : materials,
@@ -591,9 +593,6 @@ function loadMtls(mtlPaths, objPath, options) {
 }
 
 function assignDefaultMaterial(nodes, materials) {
-    if (materials.length === 0) {
-        return;
-    }
     var defaultMaterial = materials[0].name;
     var nodesLength = nodes.length;
     for (var i = 0; i < nodesLength; ++i) {