diff --git a/printer_data/config/nitehawk-36.cfg b/printer_data/config/nitehawk-36.cfg
index 38224b9..3abe3bd 100644
--- a/printer_data/config/nitehawk-36.cfg
+++ b/printer_data/config/nitehawk-36.cfg
@@ -52,6 +52,7 @@ min_temp: 0
 max_temp: 280
 min_extrude_temp: 170
 nozzle_diameter: 0.4
+filament_diameter: 1.75
 control: pid
 pid_kp = 18.874
 pid_ki = 1.446