diff --git a/lib/dns/win32/libdns.def b/lib/dns/win32/libdns.def
index 6a71d767a4..48b334a6ce 100644
--- a/lib/dns/win32/libdns.def
+++ b/lib/dns/win32/libdns.def
@@ -476,6 +476,7 @@ dns_sdb_unregister
 dns_sdb_putrr
 dns_sdb_putnamedrr
 dns_sdb_putsoa
+dns_sdb_putrdata
 dns_secalg_fromtext
 dns_secalg_totext
 dns_secproto_fromtext