diff --git a/osu.Game/Beatmaps/WorkingBeatmap.cs b/osu.Game/Beatmaps/WorkingBeatmap.cs
index 9ae87bc0a7..c9acbefd87 100644
--- a/osu.Game/Beatmaps/WorkingBeatmap.cs
+++ b/osu.Game/Beatmaps/WorkingBeatmap.cs
@@ -32,6 +32,7 @@ protected WorkingBeatmap(BeatmapInfo beatmapInfo)
             beatmap = new Lazy<Beatmap>(populateBeatmap);
             background = new Lazy<Texture>(populateBackground);
             track = new Lazy<Track>(populateTrack);
+            waveform = new Lazy<Waveform>(populateWaveform);
         }
 
         protected abstract Beatmap GetBeatmap();
@@ -73,7 +74,7 @@ private Track populateTrack()
 
         public bool WaveformLoaded => waveform.IsValueCreated;
         public Waveform Waveform => waveform.Value;
-        private Lazy<Waveform> waveform;
+        private readonly Lazy<Waveform> waveform;
 
         private Waveform populateWaveform() => GetWaveform();