diff --git a/src/SharpCompress/Archives/SevenZip/SevenZipArchive.Factory.cs b/src/SharpCompress/Archives/SevenZip/SevenZipArchive.Factory.cs
index 2ae46c112..614c44088 100644
--- a/src/SharpCompress/Archives/SevenZip/SevenZipArchive.Factory.cs
+++ b/src/SharpCompress/Archives/SevenZip/SevenZipArchive.Factory.cs
@@ -195,7 +195,7 @@ CancellationToken cancellationToken
         var buffer = ArrayPool<byte>.Shared.Rent(6);
         try
         {
-            if (!await stream.ReadFullyAsync(buffer, cancellationToken).ConfigureAwait(false))
+            if (!await stream.ReadFullyAsync(buffer, 0, 6, cancellationToken).ConfigureAwait(false))
             {
                 return false;
             }