diff --git a/lib/net/ldap.rb b/lib/net/ldap.rb
index 223f8175..a7cca625 100644
--- a/lib/net/ldap.rb
+++ b/lib/net/ldap.rb
@@ -590,6 +590,7 @@ def authenticate(username, password)
   #   }
   def encryption(args)
     return if args.nil?
+    @encryption = args if args.is_a? Hash
 
     case method = args.to_sym
     when :simple_tls, :start_tls