diff --git a/lib/easy.c b/lib/easy.c
index b648e80c1..d08c6066c 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -884,14 +884,25 @@ struct Curl_easy *curl_easy_duphandle(struct Curl_easy *data)
     goto fail;
 
 #ifdef USE_ARES
-  if(Curl_set_dns_servers(outcurl, data->set.str[STRING_DNS_SERVERS]))
-    goto fail;
-  if(Curl_set_dns_interface(outcurl, data->set.str[STRING_DNS_INTERFACE]))
-    goto fail;
-  if(Curl_set_dns_local_ip4(outcurl, data->set.str[STRING_DNS_LOCAL_IP4]))
-    goto fail;
-  if(Curl_set_dns_local_ip6(outcurl, data->set.str[STRING_DNS_LOCAL_IP6]))
-    goto fail;
+  {
+    CURLcode rc;
+
+    rc = Curl_set_dns_servers(outcurl, data->set.str[STRING_DNS_SERVERS]);
+    if(rc && rc != CURLE_NOT_BUILT_IN)
+      goto fail;
+
+    rc = Curl_set_dns_interface(outcurl, data->set.str[STRING_DNS_INTERFACE]);
+    if(rc && rc != CURLE_NOT_BUILT_IN)
+      goto fail;
+
+    rc = Curl_set_dns_local_ip4(outcurl, data->set.str[STRING_DNS_LOCAL_IP4]);
+    if(rc && rc != CURLE_NOT_BUILT_IN)
+      goto fail;
+
+    rc = Curl_set_dns_local_ip6(outcurl, data->set.str[STRING_DNS_LOCAL_IP6]);
+    if(rc && rc != CURLE_NOT_BUILT_IN)
+      goto fail;
+  }
 #endif /* USE_ARES */
 
   Curl_convert_setup(outcurl);