diff --git a/lib/convert.js b/lib/convert.js
index 8a135d8..0242177 100644
--- a/lib/convert.js
+++ b/lib/convert.js
@@ -43,7 +43,7 @@ function convert(objFile, outputPath, options) {
             return createGltf(data, inputPath, modelName);
         })
         .then(function(gltf) {
-            var aoOptions = ao ? {} : undefined;
+            var aoOptions = ao ? {enable : true} : undefined;
             var options = {
                 binary: binary,
                 embed: embed,