diff --git a/src/SharpCompress/Common/GZip/GZipFilePart.cs b/src/SharpCompress/Common/GZip/GZipFilePart.cs
index d3c614f9..690aad80 100644
--- a/src/SharpCompress/Common/GZip/GZipFilePart.cs
+++ b/src/SharpCompress/Common/GZip/GZipFilePart.cs
@@ -28,6 +28,8 @@ internal sealed class GZipFilePart : FilePart
         }
         else
         {
+            // For non-seekable streams, we can't read the trailer or track position.
+            // Set to 0 since the stream will be read sequentially from its current position.
             EntryStartPosition = 0;
         }
     }