diff --git a/osu.Game/Beatmaps/ControlPoints/ControlPointInfo.cs b/osu.Game/Beatmaps/ControlPoints/ControlPointInfo.cs
index e7035880dd..e46eb8e20a 100644
--- a/osu.Game/Beatmaps/ControlPoints/ControlPointInfo.cs
+++ b/osu.Game/Beatmaps/ControlPoints/ControlPointInfo.cs
@@ -1,6 +1,7 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Lists;
@@ -85,6 +86,9 @@ namespace osu.Game.Beatmaps.ControlPoints
         private T binarySearch<T>(SortedList<T> list, double time, T prePoint = null)
             where T : ControlPoint, new()
         {
+            if (list == null)
+                throw new ArgumentNullException(nameof(list));
+
             if (list.Count == 0)
                 return new T();