diff --git a/lib/dns/win32/libdns.def b/lib/dns/win32/libdns.def
index a45cda2a3a..b0074818ee 100644
--- a/lib/dns/win32/libdns.def
+++ b/lib/dns/win32/libdns.def
@@ -191,6 +191,7 @@ dns_dlzunregister
 dns_dnssec_findzonekeys
 dns_dnssec_findzonekeys2
 dns_dnssec_keyfromrdata
+dns_dnssec_selfsigns
 dns_dnssec_sign
 dns_dnssec_signmessage
 dns_dnssec_verify