diff --git a/BLTouch-Installation-(english).md b/BLTouch-Installation-(english).md
index 458a5b5..32a0c0f 100644
--- a/BLTouch-Installation-(english).md
+++ b/BLTouch-Installation-(english).md
@@ -142,7 +142,7 @@ Here is the auto-leveling in action:
 
 [![BLTouch on Youtube](https://img.youtube.com/vi/GLg61QyFz4U/0.jpg)](https://www.youtube.com/watch?v=GLg61QyFz4U)
 
-## Addndum
+## Addendum
 
 If your sensor is in a different place, you can change not only the Z, but also the X and Y offset with the Gcode **M851**.