diff --git a/lib/dns/win32/libdns.def.in b/lib/dns/win32/libdns.def.in
index 80f51aa13a..31f27a8556 100644
--- a/lib/dns/win32/libdns.def.in
+++ b/lib/dns/win32/libdns.def.in
@@ -611,6 +611,7 @@ dns_name_tostring
 dns_name_totext
 dns_name_totext2
 dns_name_towire
+dns_name_towire2
 dns_ncache_add
 dns_ncache_addoptout
 dns_ncache_current