diff --git a/extensions/xt_pknock.c b/extensions/xt_pknock.c
index 5efa942..37794fc 100644
--- a/extensions/xt_pknock.c
+++ b/extensions/xt_pknock.c
@@ -51,7 +51,7 @@ enum status {
  */
 struct peer {
 	struct list_head head;
-	uint32_t ip;
+	__be32 ip;
 	uint8_t proto;
 	uint32_t id_port_knocked;
 	enum status status;
@@ -542,7 +542,7 @@ remove_rule(struct xt_pknock_mtinfo *info)
  * @ip
  * @return: peer or NULL
  */
-static struct peer *get_peer(struct xt_pknock_rule *rule, uint32_t ip)
+static struct peer *get_peer(struct xt_pknock_rule *rule, __be32 ip)
 {
 	struct peer *peer;
 	struct list_head *pos, *n;
@@ -576,7 +576,7 @@ static void reset_knock_status(struct peer *peer)
  * @proto
  * @return: peer or NULL
  */
-static struct peer *new_peer(uint32_t ip, uint8_t proto)
+static struct peer *new_peer(__be32 ip, uint8_t proto)
 {
 	struct peer *peer = kmalloc(sizeof(*peer), GFP_ATOMIC);
 
diff --git a/extensions/xt_pknock.h b/extensions/xt_pknock.h
index bb82c07..38fb62d 100644
--- a/extensions/xt_pknock.h
+++ b/extensions/xt_pknock.h
@@ -45,7 +45,7 @@ struct xt_pknock_mtinfo {
 
 struct xt_pknock_nl_msg {
 	char rule_name[XT_PKNOCK_MAX_BUF_LEN+1];
-	uint32_t	peer_ip;
+	__be32 peer_ip;
 };
 
 #endif /* _XT_PKNOCK_H */