diff --git a/brewpi/brewpi.py b/brewpi/brewpi.py
index 1050ea8..cb813b0 100755
--- a/brewpi/brewpi.py
+++ b/brewpi/brewpi.py
@@ -86,8 +86,9 @@ if __name__ == '__main__':
 	# Assign temp. sensor readings to tc
 	sensor_task.set_on_changed("temp", ChangedFloat(tc.set_theta_ist, prec=2).set)
 
-	# Assign heater power set to tc model
-	heater.set_on_changed("power_set", tc.set_model_power)
+	# Assign heater power set to tc model - "Normal" has no internal model
+	if hasattr(tc, "set_model_power"):
+		heater.set_on_changed("power_set", tc.set_model_power)
 
 	# For simulation
 	if "sim" in config['Controller']['sensor_name']: