diff --git a/modules/exploits/windows/mssql/mssql_payload_sqli.rb b/modules/exploits/windows/mssql/mssql_payload_sqli.rb
index d3ae532b5b..4c006b1fe7 100644
--- a/modules/exploits/windows/mssql/mssql_payload_sqli.rb
+++ b/modules/exploits/windows/mssql/mssql_payload_sqli.rb
@@ -95,7 +95,7 @@ class Metasploit3 < Msf::Exploit::Remote
 			))
 		register_options(
 			[
-				OptString.new('DELIVERY', [ true, 'Which payload delivery method to use (ps, cmd, or old)', 'old' ])
+				OptEnum.new('DELIVERY', [true, 'Payload delivery method', 'OLD', ['PS', 'CMD', 'OLD']])
 			])
 	end