diff --git a/lib/internal/child_process.js b/lib/internal/child_process.js
index 3582383ad1..f2d961ee06 100644
--- a/lib/internal/child_process.js
+++ b/lib/internal/child_process.js
@@ -87,7 +87,7 @@ const handleConversion = {
       // remove handle from socket object, it will be closed when the socket
       // will be sent
       if (!options.keepOpen) {
-        handle.onread = function() {};
+        handle.onread = nop;
         socket._handle = null;
       }