diff --git a/include/event2/dns.h b/include/event2/dns.h
index 2025b9e6..80da2dee 100644
--- a/include/event2/dns.h
+++ b/include/event2/dns.h
@@ -478,6 +478,7 @@ int evdns_base_resolv_conf_parse(struct evdns_base *base, int flags, const char
 EVENT2_EXPORT_SYMBOL
 int evdns_base_load_hosts(struct evdns_base *base, const char *hosts_fname);
 
+#ifdef _WIN32
 /**
   Obtain nameserver information using the Windows API.
 
@@ -488,7 +489,6 @@ int evdns_base_load_hosts(struct evdns_base *base, const char *hosts_fname);
   @return 0 if successful, or -1 if an error occurred
   @see evdns_resolv_conf_parse()
  */
-#ifdef _WIN32
 EVENT2_EXPORT_SYMBOL
 int evdns_base_config_windows_nameservers(struct evdns_base *);
 #define EVDNS_BASE_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED