diff --git a/printer.cfg b/printer.cfg
index 2a4b546..2e5b814 100644
--- a/printer.cfg
+++ b/printer.cfg
@@ -173,6 +173,9 @@ sid_pin: PB15
 encoder_pins: ^PB14, ^PB10
 click_pin: ^!PB2
 
+[filament_switch_sensor fil_sensor]
+switch_pin: PA4
+
 #*# <---------------------- SAVE_CONFIG ---------------------->
 #*# DO NOT EDIT THIS BLOCK OR BELOW. The contents are auto-generated.
 #*#