diff --git a/lib/bitcoin/script/multisig.rb b/lib/bitcoin/script/multisig.rb
index <HASH>..<HASH> 100644
--- a/lib/bitcoin/script/multisig.rb
+++ b/lib/bitcoin/script/multisig.rb
@@ -1,7 +1,7 @@
 module Bitcoin
 
   # utility for multisig
-  class Multisig
+  module Multisig
     include Bitcoin::Opcodes
 
     def self.prefix
use Module rather than Class for Multisig