diff --git a/printer_data/config/nitehawk-36.cfg b/printer_data/config/nitehawk-36.cfg
index 689b933..38224b9 100644
--- a/printer_data/config/nitehawk-36.cfg
+++ b/printer_data/config/nitehawk-36.cfg
@@ -51,6 +51,7 @@ microsteps: 64
 min_temp: 0
 max_temp: 280
 min_extrude_temp: 170
+nozzle_diameter: 0.4
 control: pid
 pid_kp = 18.874
 pid_ki = 1.446