diff --git a/lib/winston/create-logger.js b/lib/winston/create-logger.js
index 1c06f7b14..bb6d13964 100644
--- a/lib/winston/create-logger.js
+++ b/lib/winston/create-logger.js
@@ -46,7 +46,7 @@ class DerivedLogger extends Logger {
       // Define prototype methods for each log level
       // e.g. logger.log('info', msg) <––> logger.info(msg) & logger.isInfoEnabled()
       // this is not an arrow function so it'll always be called on the instance instead of a fixed place in the prototype chain.
-      this[level] = function (...args) {
+      this[level] = (...args) => {
         // Optimize the hot-path which is the single object.
         if (args.length === 1) {
           const [msg] = args;