diff --git a/sam3s_example/include/board.h b/sam3s_example/include/board.h
index 8541546..72128f2 100644
--- a/sam3s_example/include/board.h
+++ b/sam3s_example/include/board.h
@@ -19,6 +19,7 @@
 #include "stdio.h"
 #include "stdlib.h"
 #include "string.h"
+#include "inttypes.h"
 
 #ifdef __GNUC__ 
 #undef __GNUC__