diff --git a/lib/index.js b/lib/index.js
index e9fa9ce..a407375 100755
--- a/lib/index.js
+++ b/lib/index.js
@@ -81,27 +81,27 @@ function generateXML (data){
         ifTruePush(item.long, item_values, {'geo:long': item.long});
 
         if( item.enclosure && item.enclosure.url) {
+
+            var enclosure_attributes = { url: item.enclosure.url };
             if( item.enclosure.file ) {
-                item_values.push({
-                    enclosure : {
-                        _attr : {
-                            url : item.enclosure.url,
-                            length : item.enclosure.size || getSize(item.enclosure.file),
-                            type : mime.lookup(item.enclosure.file)
-                        }
-                    }
-                });
+                enclosure_attributes.length = item.enclosure.size || getSize(item.enclosure.file);
+                enclosure_attributes.type = mime.lookup(item.enclosure.file);
             } else {
-                item_values.push({
-                    enclosure : {
-                        _attr : {
-                            url : item.enclosure.url,
-                            length : item.enclosure.size || 0,
-                            type : mime.lookup(item.enclosure.url)
-                        }
-                    }
+                enclosure_attributes.length = item.enclosure.size || 0;
+                enclosure_attributes.type  = mime.lookup(item.enclosure.url);
+            }
+
+            if (item.enclosure.custom_attributes){
+                Object.keys(item.enclosure.custom_attributes).forEach(function(name){
+                    enclosure_attributes[name] = item.enclosure.custom_attributes[name];
                 });
             }
+
+            item_values.push({
+                enclosure: {
+                    _attr: enclosure_attributes
+                }
+            });
         }
 
         ifTruePushArray(item.custom_elements, item_values, item.custom_elements);