diff --git a/docs/help.md b/docs/help.md
index a0aea6fde..53b0ca4ee 100644
--- a/docs/help.md
+++ b/docs/help.md
@@ -244,7 +244,6 @@ const PinoLevelToSeverityLookup = {
 const defaultPinoConf = {
   messageKey: 'message',
   formatters: {
-    messageKey: 'message',
     level(label, number) {
       return {
         severity: PinoLevelToSeverityLookup[label] || PinoLevelToSeverityLookup['info'],