diff --git a/inc/pwmout.h b/inc/pwmout.h
--- a/inc/pwmout.h
+++ b/inc/pwmout.h
@@ -1,6 +1,10 @@
 #ifndef PWMOUT_H
 #define PWMOUT_H
 
+#include "stm32f3xx_hal.h"
+#include "gpio.h"
+#include "flash.h"
+#include "error.h"
 
 #define SSR_PIN GPIO_PIN_7
 #define SSR_GPIO_Port GPIOB