diff --git a/libraries/Ethernet/src/Ethernet.cpp b/libraries/Ethernet/src/Ethernet.cpp
index 50c43c9c5..2e0f1a94f 100644
--- a/libraries/Ethernet/src/Ethernet.cpp
+++ b/libraries/Ethernet/src/Ethernet.cpp
@@ -55,7 +55,9 @@ int arduino::EthernetClass::begin(uint8_t *mac, IPAddress ip, IPAddress dns, IPA
eth_if->set_dhcp(false);
eth_if->set_network(_ip, _netmask, _gateway);
- eth_if->add_dns_server(_dnsServer1, nullptr);
+ char if_name[5];
+ eth_if->get_interface_name(if_name);
+ eth_if->add_dns_server(_dnsServer1, if_name);
auto ret = _begin(mac, timeout, responseTimeout);
return ret;
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