diff --git a/nrf5/drivers/pwm.h b/nrf5/drivers/pwm.h
index 38ca471d17..fb8167448f 100644
--- a/nrf5/drivers/pwm.h
+++ b/nrf5/drivers/pwm.h
@@ -1,6 +1,7 @@
 #ifndef __MICROPY_INCLUDED_LIB_PWM_H__
 #define __MICROPY_INCLUDED_LIB_PWM_H__
 
+void pwm_init(void);
 void pwm_start(void);
 void pwm_stop(void);
 
@@ -9,4 +10,4 @@ int32_t pwm_get_period_us(void);
 void pwm_set_duty_cycle(int32_t pin, int32_t value);
 void pwm_release(int32_t pin);
 
-#endif // __MICROPY_INCLUDED_LIB_PWM_H__
\ No newline at end of file
+#endif // __MICROPY_INCLUDED_LIB_PWM_H__