diff --git a/documentation/how-to/gnss.en.md b/documentation/how-to/gnss.en.md
index f94a52578..cfd194c50 100644
--- a/documentation/how-to/gnss.en.md
+++ b/documentation/how-to/gnss.en.md
@@ -274,7 +274,7 @@ Information for GNSS Z value with Vertical grid shift in use:
 |----------------------------|---------------------------|--------------------------------------|----------------|-----------------------------|
 | None                       | Z ellipsoidal device value| Z ellipsoidal device value           | Z ellipsoidal device value | Altitude: xxx.xxxx m       |
 | Orthometric from device    | Z orthometric device value| Z orthometric device value           | Z orthometric device value | Altitude: xxx.xxxx m (ortho.) |
-| USER_Shift_Grid.GTX <br> [vertical grid shift](#altitude-correction-/-vertical-grid-shift)        | Z shiftgrid value         | Z ellipsoidal device value           | Z shiftgrid value          | Altitude: xxx.xxxx m (grid) |
+| USER_Shift_Grid.GTX <br> [vertical grid shift](#altitude-correction-vertical-grid-shift)        | Z shiftgrid value         | Z ellipsoidal device value           | Z shiftgrid value          | Altitude: xxx.xxxx m (grid) |
 
 ### Vertex logger