diff --git a/src/hash.c b/src/hash.c
index c1712e5..9c05afb 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -79,8 +79,9 @@ void hash_trunc(unsigned char *hash32oct, unsigned char *buf) {
 void concat_data(pub_data *data, unsigned char *buf) {
 	// Turn seqno to big endian
 	uint16_t seqno = htobe16(data->seqno);
+	uint64_t id = htobe64(data->id);
 
-	if (memcpy(buf, (char*) &data->id, 8) == NULL) {
+	if (memcpy(buf, (char*) &id, 8) == NULL) {
 		print_debug(">> Concat the data (id) didn't work !");
 	}
 	if (memcpy(buf+8, (char*) &seqno, 2) == NULL) {