diff --git a/tmk_core/protocol/pjrc/main.c b/tmk_core/protocol/pjrc/main.c
index 45eb17d4..4e1823d6 100644
--- a/tmk_core/protocol/pjrc/main.c
+++ b/tmk_core/protocol/pjrc/main.c
@@ -36,6 +36,7 @@
 #include "suspend.h"
 #include "host.h"
 #include "pjrc.h"
+#include "sleep_led.h"
 
 
 #define CPU_PRESCALE(n)    (CLKPR = 0x80, CLKPR = (n))