diff --git a/CHANGELOG.md b/CHANGELOG.md
index 323774a34..79529f2c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+ - Added `LF_THAREXDE` standalone mode which simulates and reads EM4x50 cards (@tharexde)
  - Added support for bidirectional communication for `lf em 4x50 sim` (@tharexde)
  - Added `tools/hitag2crack/crack5opencl`, an optimized version of `crack5gpu` (@matrix)
  - Fixed Makefile to account for changes when running on Apple Silicon (@tcprst)
diff --git a/doc/md/Use_of_Proxmark/4_Advanced-compilation-parameters.md b/doc/md/Use_of_Proxmark/4_Advanced-compilation-parameters.md
index 6dbe54d49..2ba6aeaba 100644
--- a/doc/md/Use_of_Proxmark/4_Advanced-compilation-parameters.md
+++ b/doc/md/Use_of_Proxmark/4_Advanced-compilation-parameters.md
@@ -79,6 +79,7 @@ Here are the supported values you can assign to `STANDALONE` in `Makefile.platfo
 |-----------------|----------------------------------------|
 |                 | No standalone mode
 | LF_SKELETON     | standalone mode skeleton - Iceman1001
+| LF_THAREXDE     | LF EM4x50 simulator/read standalone mode - tharexde
 | LF_EM4100EMUL   | LF EM4100 simulator standalone mode - temskiy
 | LF_EM4100RSWB   | LF EM4100 read/write/clone/brute mode - Monster1024
 | LF_EM4100RWC    | LF EM4100 read/write/clone mode - temskiy