diff --git a/src/Web/Avalonia.Web/Storage/BlobReadableStream.cs b/src/Web/Avalonia.Web/Storage/BlobReadableStream.cs
index 6afc5e3054..a48f809c06 100644
--- a/src/Web/Avalonia.Web/Storage/BlobReadableStream.cs
+++ b/src/Web/Avalonia.Web/Storage/BlobReadableStream.cs
@@ -6,6 +6,7 @@ using System.Threading.Tasks;
 
 namespace Avalonia.Web.Storage;
 
+[System.Runtime.Versioning.SupportedOSPlatform("browser")] // gets rid of callsite warnings
 internal class BlobReadableStream : Stream
 {
     private JSObject? _jSReference;