diff --git a/libraries/AP_Progmem/AP_Progmem.h b/libraries/AP_Progmem/AP_Progmem.h
index 8a7f4a0645f1b..c2be26ba22e3b 100644
--- a/libraries/AP_Progmem/AP_Progmem.h
+++ b/libraries/AP_Progmem/AP_Progmem.h
@@ -2,6 +2,7 @@
 #ifndef __AP_PROGMEM_H__
 #define __AP_PROGMEM_H__
 
+#include <AP_HAL_Boards.h>
 #if defined(__AVR__) 
 #include "AP_Progmem_AVR.h"
 #elif defined(PX4FMU_BUILD) || (CONFIG_HAL_BOARD==HAL_BOARD_AVR_SITL)