diff --git a/include/event2/dns.h b/include/event2/dns.h
index 80da2dee..902544c2 100644
--- a/include/event2/dns.h
+++ b/include/event2/dns.h
@@ -478,7 +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
+#if defined(EVENT_IN_DOXYGEN_) || defined(_WIN32)
 /**
   Obtain nameserver information using the Windows API.