diff --git a/keyboards/tutte_coxeter_36k/readme.md b/keyboards/tutte_coxeter_36k/readme.md
index 41744138..19a5dca1 100644
--- a/keyboards/tutte_coxeter_36k/readme.md
+++ b/keyboards/tutte_coxeter_36k/readme.md
@@ -54,6 +54,8 @@ board in order to fit the same 3D printed case, including reset button placement
 * Hardware Supported: Gamma Omega TC36K (no-diode single PCB) using Raspberry Pi Pico
 * Hardware Availability: https://github.com/unspecworks/gamma-omega/tree/main/tc36k
 
+See also the [TC36K ZMK firmware](https://github.com/peterjc/zmk-keyboard-firmware/tree/main/boards/shields/tc36k).
+
 Make example for this keyboard (after setting up your build environment):
 
     make tutte_coxeter_36k:default