diff --git a/CHANGELOG b/CHANGELOG
index ca99d565..321c1c89 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -127,6 +127,9 @@ HISTORY
 
   ++ Bugfixes:
 
+  2014-09-16: Kevin Cernekee
+  * dns.c: patch #8480 Fix handling of dns_seqno wraparound
+
   2014-09-16: Simon Goldschmidt
   * tcp_out.c: fixed bug #43192 tcp_enqueue_flags() should not check TCP_SND_QUEUELEN
     when sending FIN
diff --git a/src/core/dns.c b/src/core/dns.c
index 15b65708..b89059cc 100644
--- a/src/core/dns.c
+++ b/src/core/dns.c
@@ -1161,7 +1161,7 @@ dns_enqueue(const char *name, size_t hostnamelen, dns_found_callback found,
     }
     /* check if this is the oldest completed entry */
     if (entry->state == DNS_STATE_DONE) {
-      if ((dns_seqno - entry->seqno) > lseq) {
+      if ((u8_t)(dns_seqno - entry->seqno) > lseq) {
         lseq = dns_seqno - entry->seqno;
         lseqi = i;
       }