diff --git a/src/rtp/pbuf.c b/src/rtp/pbuf.c
index 98e2ec598..6329b83f8 100644
--- a/src/rtp/pbuf.c
+++ b/src/rtp/pbuf.c
@@ -210,7 +210,7 @@ static void add_coded_unit(struct pbuf_node *node, rtp_packet * pkt)
                         free(pkt);
                         free(tmp);
                 } else {
-                        while (curr != NULL &&  ((uint16_t)(tmp->seqno - curr->seqno) < 0)){
+                        while (curr != NULL &&  ((int16_t)(tmp->seqno - curr->seqno) < 0)){
                                 prv = curr;
                                 curr = curr->nxt;
                         }