diff --git a/src/SharpCompress/Common/AsyncBinaryReader.cs b/src/SharpCompress/Common/AsyncBinaryReader.cs
index 8c5327ae..99a29786 100644
--- a/src/SharpCompress/Common/AsyncBinaryReader.cs
+++ b/src/SharpCompress/Common/AsyncBinaryReader.cs
@@ -16,6 +16,11 @@ namespace SharpCompress.Common
 
         public AsyncBinaryReader(Stream stream, bool leaveOpen = false, int bufferSize = 4096)
         {
+            if (!stream.CanRead)
+            {
+                throw new ArgumentException("Stream must be readable.");
+            }
+
             _originalStream = stream ?? throw new ArgumentNullException(nameof(stream));
             _leaveOpen = leaveOpen;
 
diff --git a/src/SharpCompress/Common/Tar/TarHeaderFactory.cs b/src/SharpCompress/Common/Tar/TarHeaderFactory.cs
index 8f155b11..f9c58e2b 100644
--- a/src/SharpCompress/Common/Tar/TarHeaderFactory.cs
+++ b/src/SharpCompress/Common/Tar/TarHeaderFactory.cs
@@ -29,10 +29,10 @@ internal static class TarHeaderFactory
                 {
                     case StreamingMode.Seekable:
                         {
-                            header.DataStartPosition = reader.BaseStream.Position;
+                            header.DataStartPosition = stream.Position;
 
                             //skip to nearest 512
-                            reader.BaseStream.Position += PadTo512(header.Size);
+                            stream.Position += PadTo512(header.Size);
                         }
                         break;
                     case StreamingMode.Streaming:
diff --git a/tests/SharpCompress.Test/Tar/TarReaderAsyncTests.cs b/tests/SharpCompress.Test/Tar/TarReaderAsyncTests.cs
index ee8e7942..dec06f22 100644
--- a/tests/SharpCompress.Test/Tar/TarReaderAsyncTests.cs
+++ b/tests/SharpCompress.Test/Tar/TarReaderAsyncTests.cs
@@ -175,7 +175,7 @@ public class TarReaderAsyncTests : ReaderTests
         await using var entryStream = await reader.OpenEntryStreamAsync();
         await using var flushingStream = new FlushOnDisposeStream(entryStream);
 #else
-         using var entryStream = reader.OpenEntryStream();
+         using var entryStream = await reader.OpenEntryStreamAsync();
          using var flushingStream = new FlushOnDisposeStream(entryStream);
         #endif