diff --git a/libs/sofia-sip/libsofia-sip-ua/nta/nta.c b/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
index 9b2e295007..04e64caf57 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
@@ -10546,7 +10546,7 @@ struct sipdns_tport const *
 outgoing_naptr_tport(nta_outgoing_t *orq, sres_record_t *answers[])
 {
   int i, j, order, pref;
-  int orders[SIPDNS_TRANSPORTS], prefs[SIPDNS_TRANSPORTS];
+  int orders[SIPDNS_TRANSPORTS] = {0}, prefs[SIPDNS_TRANSPORTS];
   struct sipdns_tport const *tport;
 
   struct sipdns_resolver *sr = orq->orq_resolver;