diff --git a/nselib/sslcert.lua b/nselib/sslcert.lua
index aad7c12f3..6d5be7ed7 100644
--- a/nselib/sslcert.lua
+++ b/nselib/sslcert.lua
@@ -591,7 +591,7 @@ local SPECIALIZED_PREPARE_TLS = {
   [119] = StartTLS.nntp_prepare_tls,
   imap = StartTLS.imap_prepare_tls,
   [143] = StartTLS.imap_prepare_tls,
-  [ldap] = StartTLS.ldap_prepare_tls,
+  ldap = StartTLS.ldap_prepare_tls,
   [389] = StartTLS.ldap_prepare_tls,
   pop3 = StartTLS.pop3_prepare_tls,
   [110] = StartTLS.pop3_prepare_tls,