diff --git a/lib/drivers/node-mongodb-native/collection.js b/lib/drivers/node-mongodb-native/collection.js
index fc9235f6f48..2fb6804c3f4 100644
--- a/lib/drivers/node-mongodb-native/collection.js
+++ b/lib/drivers/node-mongodb-native/collection.js
@@ -208,14 +208,14 @@ function iter(i) {
 
     if (debug) {
       if (typeof debug === 'function') {
-        let range = '';
+        let argsToAdd = null;
         if (typeof args[args.length - 1] == 'function') {
-          range = args.slice(0, args.length - 1);
+          argsToAdd = args.slice(0, args.length - 1);
         } else {
-          range = args.slice(0, args.length);
+          argsToAdd = args;
         }
         debug.apply(_this,
-          [_this.name, i].concat(range));
+          [_this.name, i].concat(argsToAdd));
       } else if (debug instanceof stream.Writable) {
         this.$printToStream(_this.name, i, args, debug);
       } else {