diff --git a/include/ucore/utils.h b/include/ucore/utils.h
index 26d706e..7253f04 100644
--- a/include/ucore/utils.h
+++ b/include/ucore/utils.h
@@ -1,6 +1,9 @@
 #ifndef UCORE_UTILS_H_
 #define UCORE_UTILS_H_
 #include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "backtrace.h"
 
 //Gnerate a compiler error if the compile time
 //constant expression fails