diff --git a/src/Microsoft.AspNet.Http.Extensions/FormFileExtensions.cs b/src/Microsoft.AspNet.Http.Extensions/FormFileExtensions.cs
index a0c78ead9e..e97059c66b 100644
--- a/src/Microsoft.AspNet.Http.Extensions/FormFileExtensions.cs
+++ b/src/Microsoft.AspNet.Http.Extensions/FormFileExtensions.cs
@@ -12,7 +12,8 @@ namespace Microsoft.AspNet.Http
     /// </summary>
     public static class FormFileExtensions
     {
-        private static int DefaultBufferSize = 81920;
+        // Stream.CopyTo method uses 80KB as the default buffer size.
+        private static int DefaultBufferSize = 80 * 1024;
 
         /// <summary>
         /// Saves the contents of an uploaded file.