diff --git a/lib/isc/win32/libisc.def b/lib/isc/win32/libisc.def
index da268a1a58..e828ae3c55 100644
--- a/lib/isc/win32/libisc.def
+++ b/lib/isc/win32/libisc.def
@@ -312,11 +312,14 @@ isc_os_ncpus
 isc_parse_uint16
 isc_parse_uint32
 isc_parse_uint8
+isc_portset_add
 isc_portset_addrange
 isc_portset_create
 isc_portset_destroy
 isc_portset_issset
 isc_portset_nports
+isc_portset_remove
+isc_portset_removerange
 isc_quota_attach
 isc_quota_destroy
 isc_quota_detach