1 files changed, 11 insertions, 0 deletions
diff --git a/lib/hostsyn.c b/lib/hostsyn.c
index b60188708..d1a907924 100644
--- a/lib/hostsyn.c
+++ b/lib/hostsyn.c
@@ -66,5 +66,16 @@
  **********************************************************************/
 #ifdef CURLRES_SYNCH
 
+/*
+ * Function provided by the resolver backend to set DNS servers to use.
+ */
+CURLcode Curl_set_dns_servers(struct SessionHandle *data,
+                              char *servers)
+{
+  (void)data;
+  (void)servers;
+  return CURLE_NOT_BUILT_IN;
+
+}
 
 #endif /* truly sync */