diff --git a/sources/sysinit.c b/sources/sysinit.c
index f5065a9..5774076 100644
--- a/sources/sysinit.c
+++ b/sources/sysinit.c
@@ -25,6 +25,7 @@
  *
  */
 
+#include <stdbool.h>
 #include "MCF5475.h"
 #include "startcf.h"
 #include "cache.h"