diff --git a/src/main.c b/src/main.c
index 5e3f608..0dbfad5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -591,6 +591,7 @@ static void unproc_thread(void) {
 		u8_t expected_seq = next_seq(h5.last_seen_seq_from_host);
         if (hdr.is_reliable && hdr.seq != expected_seq) {
 			LOG_ERR("Seq expected %u got %u. Drop packet", expected_seq, hdr.seq);
+			net_buf_unref(rx_buf);
             goto next;
         }
         h5.last_seen_seq_from_host = hdr.seq;