diff --git a/src/SharpCompress/IO/DataDescriptorStream.cs b/src/SharpCompress/IO/DataDescriptorStream.cs
index 8ba9eb0f..ab06a407 100644
--- a/src/SharpCompress/IO/DataDescriptorStream.cs
+++ b/src/SharpCompress/IO/DataDescriptorStream.cs
@@ -51,7 +51,7 @@ public class DataDescriptorStream : Stream
 
     public override long Position
     {
-        get => _stream.Position;
+        get => _stream.Position - _start;
         set => _stream.Position = value;
     }