diff --git a/nselib/shortport.lua b/nselib/shortport.lua
index 082c6dde5..687d38628 100644
--- a/nselib/shortport.lua
+++ b/nselib/shortport.lua
@@ -194,6 +194,7 @@ local LIKELY_SSL_PORTS = {
   993, -- imaps
   994, -- ircs
   995, -- pop3s
+  3269, -- globalcatLDAPssl
   3389, -- ms-wbt-server
   5061, -- sip-tls
   6679,