diff --git a/klippy/extras/filament_motion_sensor.py b/klippy/extras/filament_motion_sensor.py
index 7928c767175c..83726e346118 100644
--- a/klippy/extras/filament_motion_sensor.py
+++ b/klippy/extras/filament_motion_sensor.py
@@ -86,7 +86,7 @@ def set_filament_sensor(self, gcmd):
             gcmd.respond_info(self.get_sensor_status())
             return
         if enable is not None:
-            if enable and not self.runout_helper.sensor_enabled:
+            if enable != self.runout_helper.sensor_enabled:
                 reset = 1
             self.runout_helper.sensor_enabled = enable
         if detection_length is not None: