diff --git a/lib/dns/win32/libdns.def.in b/lib/dns/win32/libdns.def.in
index 0ece84a822..596c5d4d27 100644
--- a/lib/dns/win32/libdns.def.in
+++ b/lib/dns/win32/libdns.def.in
@@ -1050,6 +1050,7 @@ dns_xfrin_shutdown
 dns_zone_addnsec3chain
 dns_zone_asyncload
 dns_zone_attach
+dns_zone_cdscheck
 dns_zone_checknames
 dns_zone_clearforwardacl
 dns_zone_clearnotifyacl