diff --git a/docs/cm4_conf_txt_add.md b/docs/cm4_conf_txt_add.md
index 2bb65a4..373fc87 100644
--- a/docs/cm4_conf_txt_add.md
+++ b/docs/cm4_conf_txt_add.md
@@ -2,3 +2,10 @@
 dtoverlay=dwc2,dr_mode=host
 eeprom_write_protect=1
 ```
+
+```
+cmd:
+
+```
+systemctl mask rpi-eeprom-update.service
+```