diff --git a/Doc/library/struct.rst b/Doc/library/struct.rst
index 416b01db615..54d717c5397 100644
--- a/Doc/library/struct.rst
+++ b/Doc/library/struct.rst
@@ -156,6 +156,21 @@ following table:
 
 If the first character is not one of these, ``'@'`` is assumed.
 
+.. note::
+
+   The number 1023 (``0x3ff`` in hexadecimal) has the following byte representations:
+
+   * ``03 ff`` in big-endian (``>``)
+   * ``ff 03`` in little-endian (``<``)
+
+   Python example:
+
+       >>> import struct
+       >>> struct.pack('>h', 1023)
+       b'\x03\xff'
+       >>> struct.pack('<h', 1023)
+       b'\xff\x03'
+
 Native byte order is big-endian or little-endian, depending on the
 host system. For example, Intel x86, AMD64 (x86-64), and Apple M1 are
 little-endian; IBM z and many legacy architectures are big-endian.