diff --git a/lib/internal/wrap_js_stream.js b/lib/internal/wrap_js_stream.js
index 146119f4cf6390..f7d2a376cc5e8b 100644
--- a/lib/internal/wrap_js_stream.js
+++ b/lib/internal/wrap_js_stream.js
@@ -11,6 +11,12 @@ const errors = require('internal/errors');
 const kCurrentWriteRequest = Symbol('kCurrentWriteRequest');
 const kCurrentShutdownRequest = Symbol('kCurrentShutdownRequest');
 
+function isClosing() { return this.owner.isClosing(); }
+function onreadstart() { return this.owner.readStart(); }
+function onreadstop() { return this.owner.readStop(); }
+function onshutdown(req) { return this.owner.doShutdown(req); }
+function onwrite(req, bufs) { return this.owner.doWrite(req, bufs); }
+
 /* This class serves as a wrapper for when the C++ side of Node wants access
  * to a standard JS stream. For example, TLS or HTTP do not operate on network
  * resources conceptually, although that is the common case and what we are
@@ -32,13 +38,11 @@ class JSStreamWrap extends Socket {
     };
     // Inside of the following functions, `this` refers to the handle
     // and `this.owner` refers to this JSStreamWrap instance.
-    handle.isClosing = function() { return this.owner.isClosing(); };
-    handle.onreadstart = function() { return this.owner.readStart(); };
-    handle.onreadstop = function() { return this.owner.readStop(); };
-    handle.onshutdown = function(req) { return this.owner.doShutdown(req); };
-    handle.onwrite = function(req, bufs) {
-      return this.owner.doWrite(req, bufs);
-    };
+    handle.isClosing = isClosing;
+    handle.onreadstart = onreadstart;
+    handle.onreadstop = onreadstop;
+    handle.onshutdown = onshutdown;
+    handle.onwrite = onwrite;
 
     stream.pause();
     stream.on('error', (err) => this.emit('error', err));