diff --git a/lib/gridfs-stream/download.js b/lib/gridfs-stream/download.js
index 7262ffdd737..d0168a572bf 100644
--- a/lib/gridfs-stream/download.js
+++ b/lib/gridfs-stream/download.js
@@ -298,11 +298,18 @@ function init(self) {
       return;
     }
 
-    self.s.cursor = self.s.chunks.find({ files_id: doc._id }).sort({ n: 1 });
+    self.s.cursor = self.s.chunks.find({ files_id: doc._id }, {
+      //noCursorTimeout: true, // doesn't affect
+      //maxTimeMS: 5000, // doesn't affect
+      batchSize: 15
+    }).sort({ n: 1 });
     if (self.s.readPreference) {
       self.s.cursor.setReadPreference(self.s.readPreference);
     }
-
+    
+    // doesn't affect
+    //self.s.cursor.addCursorFlag('noCursorTimeout', true);
+    
     self.s.expectedEnd = Math.ceil(doc.length / doc.chunkSize);
     self.s.file = doc;
     self.s.bytesToSkip = handleStartOption(self, doc, self.s.cursor,