diff --git a/modules/auxiliary/scanner/ntp/timeroast.rb b/modules/auxiliary/scanner/ntp/timeroast.rb
index a08ec1180c7d..7e39a6cf873f 100644
--- a/modules/auxiliary/scanner/ntp/timeroast.rb
+++ b/modules/auxiliary/scanner/ntp/timeroast.rb
@@ -36,6 +36,7 @@ def initialize(info = {})
       )
     )
     register_options([
+      Opt::RPORT(123),
       OptIntRange.new('RIDS', [ true, 'The RIDs to enumerate (e.g. 1000-2000).' ]),
       OptInt.new('DELAY', [ true, 'The delay in milliseconds between attempts.', 20]),
       OptInt.new('TIMEOUT', [ true, 'The timeout in seconds to wait at the end for replies.', 5])