fix typo in variable name (closes #21586)
diff --git a/Doc/howto/sockets.rst b/Doc/howto/sockets.rst
index 820beb5..c04fd55 100644
--- a/Doc/howto/sockets.rst
+++ b/Doc/howto/sockets.rst
@@ -210,7 +210,7 @@
                chunk = self.sock.recv(min(MSGLEN - bytes_recd, 2048))
                if chunk == b'':
                    raise RuntimeError("socket connection broken")
-               chucks.append(chunk)
+               chunks.append(chunk)
                bytes_recd = bytes_recd + len(chunk)
            return b''.join(chunks)