diff --git a/lib/python/qtvcp/lib/mdi_text.py b/lib/python/qtvcp/lib/mdi_text.py
index 9dc7b5d7f77..e1a4cdca880 100644
--- a/lib/python/qtvcp/lib/mdi_text.py
+++ b/lib/python/qtvcp/lib/mdi_text.py
@@ -628,8 +628,8 @@ def gcode_descriptions(gcode):
 
 """
 G43 = """G43 Tool Length Offset
-G43 H
-H = tool number (optional)
+G43 Hn
+n = tool number, Hn is optional
 
 G43 enables tool length compensation. G43 changes
 subsequent motions by offsetting the axis