diff --git a/ports/espressif/esp-idf-config/sdkconfig.defaults b/ports/espressif/esp-idf-config/sdkconfig.defaults
index 2d87778386807..0fc26c165c76c 100644
--- a/ports/espressif/esp-idf-config/sdkconfig.defaults
+++ b/ports/espressif/esp-idf-config/sdkconfig.defaults
@@ -67,7 +67,7 @@ CONFIG_LWIP_SO_RCVBUF=y
 # IPv6
 #
 CONFIG_LWIP_IPV6_AUTOCONFIG=y
-CONFIG_LWIP_IPV6_RDNSS_MAX_DNS_SERVERS=2
+CONFIG_LWIP_IPV6_RDNSS_MAX_DNS_SERVERS=0
 CONFIG_LWIP_IPV6_DHCP6=y
 #
 # TCP