diff --git a/config.g b/config.g
index ca2b115..ecaf81d 100644
--- a/config.g
+++ b/config.g
@@ -79,8 +79,7 @@ G10 P0 R0 S0                                       ; set initial tool 0 active a
 ; Custom settings are not defined
 
 ; Filament sensor - Duet3D laser filament monitor
-M574 E0 S1 P"io4.in"                               ; configure extruder endstop 
-M591 D0 P5 C"E0_stop" R40:120 E3.0 S1              ; Duet3D laser sensor for extruder drive 0, connected to endstop input 4 (E0), tolerance 40 to 120%, 3mm comparison length, enabled filament monitoring
+M591 D0 P5 C"0.io4.in" R40:120 E3.0 S1              ; Duet3D laser sensor for extruder drive 0, connected to endstop input 4 (E0), tolerance 40 to 120%, 3mm comparison length, enabled filament monitoring
 
 ; Miscellaneous
 M575 P1 S1 B57600                                  ; enable support for PanelDue