diff --git a/common/softpwm_led.c b/common/softpwm_led.c
index 1c072bb0..69bfdc60 100644
--- a/common/softpwm_led.c
+++ b/common/softpwm_led.c
@@ -1,5 +1,6 @@
 #include <avr/io.h>
 #include <avr/interrupt.h>
+#include <avr/pgmspace.h>
 #include "led.h"
 #include "softpwm_led.h"
 #include "debug.h"