diff --git a/place_tracker/lib/place_map.dart b/place_tracker/lib/place_map.dart
index 3c7de677c..375f03bdb 100644
--- a/place_tracker/lib/place_map.dart
+++ b/place_tracker/lib/place_map.dart
@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:math';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';