silence coverity warning

diff --git a/lib/dns/adb.c b/lib/dns/adb.c
index 100316b7cf2a2e0cd9c5da4aeb38282f231d265c..4051cede239df1d0af93550f3a7006bf433fad92 100644 (file)
--- a/lib/dns/adb.c
+++ b/lib/dns/adb.c
@@ -4051,8 +4051,8 @@ adjustsrtt(dns_adbaddrinfo_t *addr, unsigned int rtt, unsigned int factor,
                } else
                        new_srtt = addr->entry->srtt;
        } else
-               new_srtt = (addr->entry->srtt / 10 * factor)
-                       + (rtt / 10 * (10 - factor));
+               new_srtt = ((isc_uint64_t)addr->entry->srtt / 10 * factor)
+                       + ((isc_uint64_t)rtt / 10 * (10 - factor));
 
        addr->entry->srtt = (unsigned int) new_srtt;
        addr->srtt = (unsigned int) new_srtt;