diff --git a/config/avrsim.cfg b/config/avrsim.cfg
index 774f4f3b..ffd2fa2b 100644
--- a/config/avrsim.cfg
+++ b/config/avrsim.cfg
@@ -58,6 +58,7 @@ pid_Kp: 22.2
 pid_Ki: 1.08
 pid_Kd: 114
 min_temp: 0
+min_extrude_temp: 0
 max_temp: 210
 
 [heater_bed]
diff --git a/klippy/heater.py b/klippy/heater.py
index 3797b917..bef1f48c 100644
--- a/klippy/heater.py
+++ b/klippy/heater.py
@@ -29,7 +29,7 @@ class PrinterHeater:
         self.thermistor_c = Thermistors.get(config.get('thermistor_type'))
         self.pullup_r = config.getfloat('pullup_resistor', 4700.)
         self.min_extrude_temp = config.getfloat('min_extrude_temp', 170.)
-        self.can_extrude = False
+        self.can_extrude = self.min_extrude_temp <= 0.
         self.lock = threading.Lock()
         self.last_temp = 0.
         self.last_temp_time = 0.