diff --git a/conf.d/10-pf.conf b/conf.d/10-pf.conf
index 3096982cf1eb8fe099b9f4e1958fa5cec27bd51e..0e39a3c2f2981d2afed3504e5e403640c22f8425 100644
--- a/conf.d/10-pf.conf
+++ b/conf.d/10-pf.conf
@@ -11,8 +11,7 @@ filter {
       locale => "en"
     }
     mutate {
-      copy => { "[message]" => "[event][original]"}
-      replace => [ "syslog_message", "%{message}" ]
+      rename => { "[message]" => "[event][original]"}
     }
   }
 }