diff --git a/osu.Game/Beatmaps/BeatmapManager.cs b/osu.Game/Beatmaps/BeatmapManager.cs
index f626b45e42..e5907809f3 100644
--- a/osu.Game/Beatmaps/BeatmapManager.cs
+++ b/osu.Game/Beatmaps/BeatmapManager.cs
@@ -201,7 +201,9 @@ public void Save(BeatmapInfo info, IBeatmap beatmapContent)
                 using (var sw = new StreamWriter(stream, Encoding.UTF8, 1024, true))
                     new LegacyBeatmapEncoder(beatmapContent).Encode(sw);
 
-                stream.Seek(0, SeekOrigin.Begin);
+                var attachedInfo = setInfo.Beatmaps.Single(b => b.ID == info.ID);
+                var md5Hash = stream.ComputeMD5Hash();
+                attachedInfo.MD5Hash = md5Hash;
 
                 UpdateFile(setInfo, setInfo.Files.Single(f => string.Equals(f.Filename, info.Path, StringComparison.OrdinalIgnoreCase)), stream);
             }