diff --git a/trie/trie.h b/trie/trie.h
index 154aafd..d16407f 100644
--- a/trie/trie.h
+++ b/trie/trie.h
@@ -5,16 +5,16 @@
 #include "stdlib.h"
 #include "string.h"
 
+#define VALID_RULE 1
+#define INVALID_RULE 0
+#define RULE_NOT_FOUND -1
+
 union ipv6 {
     unsigned short s[8];
     unsigned int   i[4];
     unsigned long  l[2];
 };
 
-#define VALID_RULE 1
-#define INVALID_RULE 0
-#define RULE_NOT_FOUND -1
-
 struct trie_node {
     struct trie_node*   _l;
     struct trie_node*   _r;