diff --git a/include/r3_define.h b/include/r3_define.h
new file mode 100644
index 0000000..bee91da
--- /dev/null
+++ b/include/r3_define.h
@@ -0,0 +1,36 @@
+/*
+ * r3_define.h
+ * Copyright (C) 2014 c9s <c9s@c9smba.local>
+ *
+ * Distributed under terms of the MIT license.
+ */
+
+#ifndef DEFINE_H
+#define DEFINE_H
+
+#ifndef bool
+typedef unsigned char bool;
+#endif
+#ifndef FALSE
+#    define FALSE 0
+#endif
+#ifndef TRUE
+#    define TRUE 1
+#endif
+
+// #define DEBUG 1
+#ifdef DEBUG
+
+#define info(fmt, ...) \
+            do { fprintf(stderr, fmt, __VA_ARGS__); } while (0)
+
+#define debug(fmt, ...) \
+        do { fprintf(stderr, "%s:%d:%s(): " fmt, __FILE__, \
+                                __LINE__, __func__, __VA_ARGS__); } while (0)
+
+#else
+#define info(...);
+#define debug(...);
+#endif
+
+#endif /* !DEFINE_H */
diff --git a/include/str_array.h b/include/str_array.h
index bcefdf8..3b37fda 100644
--- a/include/str_array.h
+++ b/include/str_array.h
@@ -8,6 +8,8 @@
 #ifndef TOKEN_H
 #define TOKEN_H
 
+#include "r3_define.h"
+
 typedef struct _str_array {
   char **tokens;
   int    len;
diff --git a/src/node.c b/src/node.c
index 20a701c..38b9fcf 100644
--- a/src/node.c
+++ b/src/node.c
@@ -14,6 +14,7 @@
 // #include <Judy.h>
 
 #include "r3.h"
+#include "r3_define.h"
 #include "r3_str.h"
 #include "str_array.h"