diff --git a/extruder/heater.c b/extruder/heater.c
index f2f057d..3a68986 100644
--- a/extruder/heater.c
+++ b/extruder/heater.c
@@ -28,7 +28,7 @@ typedef struct {
 #undef DEFINE_HEATER
 /// \brief helper macro to fill heater definition struct from config.h
 // #define DEFINE_HEATER(name, port, pin, pwm) { &(port), (pin), &(pwm) },
-#define	DEFINE_HEATER(name, pin) { &(pin ## _WPORT), pin ## _PIN, &(pin ## _PWM) },
+#define	DEFINE_HEATER(name, pin) { &(pin ## _WPORT), pin ## _PIN, (pin ## _PWM) },
 static const heater_definition_t heaters[NUM_HEATERS] =
 {
 	#include	"config.h"