diff --git a/lib/internal/process/warning.js b/lib/internal/process/warning.js
index 18dd8e9e03d1c6..d12618ccf4826e 100644
--- a/lib/internal/process/warning.js
+++ b/lib/internal/process/warning.js
@@ -54,7 +54,7 @@ function writeToFile(message) {
 }
 
 function doEmitWarning(warning) {
-  return () => process.emit('warning', warning);
+  process.emit('warning', warning);
 }
 
 let traceWarningHelperShown = false;
@@ -140,7 +140,7 @@ function emitWarning(warning, type, code, ctor, now) {
       throw warning;
   }
   if (now) process.emit('warning', warning);
-  else process.nextTick(doEmitWarning(warning));
+  else process.nextTick(doEmitWarning, warning);
 }
 
 module.exports = {