diff --git a/DOC/Methods-Extern.txt b/DOC/Methods-Extern.txt
index 3ef260d0..a6e338ca 100644
--- a/DOC/Methods-Extern.txt
+++ b/DOC/Methods-Extern.txt
@@ -29,10 +29,12 @@ License:
 LZHAM library is provided as open source software using a MIT license.
 
 7-Zip Container Header:
- Byte _ver_major;
- Byte _ver_minor;
+ Byte _ver;
+ Byte _dict_size;
  Byte _level;
- Byte _reserved[2];
+ Byte _flags;
+ Byte _reserved[1];
+
 
 Algorithm author:    Rich Geldreich
 Algorithm Homepage:  https://github.com/richgel999/lzham_codec