diff --git a/netutils/netlib/netlib_setipv4dnsaddr.c b/netutils/netlib/netlib_setipv4dnsaddr.c
index 4d4e82404..f95af1c9d 100644
--- a/netutils/netlib/netlib_setipv4dnsaddr.c
+++ b/netutils/netlib/netlib_setipv4dnsaddr.c
@@ -68,6 +68,7 @@ int netlib_set_ipv4dnsaddr(FAR const struct in_addr *inaddr)
       addr.sin_family = AF_INET;
       addr.sin_port   = 0;
       memcpy(&addr.sin_addr, inaddr, sizeof(struct in_addr));
+      bzero(&addr.sin_zero, sizeof(addr.sin_zero));
 
       ret = dns_add_nameserver((FAR const struct sockaddr *)&addr,
                                sizeof(struct sockaddr_in));