fix negative number in logline

diff --git a/pdns/rfc2136handler.cc b/pdns/rfc2136handler.cc
index 262763b22466e7c236db2f27d66e98ee6df309e9..1941b564b6a3daf367f52c51740794afc5fa71ac 100644 (file)
--- a/pdns/rfc2136handler.cc
+++ b/pdns/rfc2136handler.cc
@@ -957,7 +957,7 @@ void PacketHandler::increaseSerial(const string &msgPrefix, const DomainInfo *di
   }
   SOAData soa2Update;
   fillSOAData(rec.content, soa2Update);
-  int oldSerial = soa2Update.serial;
+  uint32_t oldSerial = soa2Update.serial;
 
   if (oldSerial == 0) { // using Autoserial, leave the serial alone.
     L<<Logger::Notice<<msgPrefix<<"AutoSerial being used, not updating SOA serial."<<endl;