diff --git a/lib/dns/win32/libdns.def.in b/lib/dns/win32/libdns.def.in
index 84fbba1e05..4c8230e24a 100644
--- a/lib/dns/win32/libdns.def.in
+++ b/lib/dns/win32/libdns.def.in
@@ -552,7 +552,9 @@ dns_name_isabsolute
 dns_name_isdnssd
 dns_name_ishostname
 dns_name_ismailbox
+dns_name_isrfc1918
 dns_name_issubdomain
+dns_name_isula
 dns_name_isvalid
 dns_name_iswildcard
 dns_name_matcheswildcard