diff --git a/lib/logstash/filters/clone.rb b/lib/logstash/filters/clone.rb
index 1f186bb65..13004f1d2 100644
--- a/lib/logstash/filters/clone.rb
+++ b/lib/logstash/filters/clone.rb
@@ -23,7 +23,7 @@ class LogStash::Filters::Clone < LogStash::Filters::Base
     return unless filter?(event)
     @clones.each do |type|
       clone = event.clone
-      clone.type = type
+      clone["type"] = type
       filter_matched(clone)
       @logger.debug("Cloned event", :clone => clone, :event => event)