diff --git a/lib/dns/win32/libdns.def b/lib/dns/win32/libdns.def
index 2078336832..59505b956f 100644
--- a/lib/dns/win32/libdns.def
+++ b/lib/dns/win32/libdns.def
@@ -164,6 +164,7 @@ dns_dispatch_detach
 dns_dispatch_getlocaladdress
 dns_dispatch_getsocket
 dns_dispatch_getudp
+dns_dispatch_hash
 dns_dispatch_importrecv
 dns_dispatch_removeresponse
 dns_dispatch_starttcp