diff --git a/osu.Game/IO/Archives/MemoryStreamArchiveReader.cs b/osu.Game/IO/Archives/MemoryStreamArchiveReader.cs
index 37ce1e508e..d8e1199e93 100644
--- a/osu.Game/IO/Archives/MemoryStreamArchiveReader.cs
+++ b/osu.Game/IO/Archives/MemoryStreamArchiveReader.cs
@@ -19,7 +19,7 @@ namespace osu.Game.IO.Archives
             this.stream = stream;
         }
 
-        public override Stream GetStream(string name) => new MemoryStream(stream.GetBuffer(), 0, (int)stream.Length);
+        public override Stream GetStream(string name) => new MemoryStream(stream.ToArray(), 0, (int)stream.Length);
 
         public override void Dispose()
         {