diff --git a/lib/internal/buffer.js b/lib/internal/buffer.js
index 744bf2dcab6ec4..c6b47c291e5b24 100644
--- a/lib/internal/buffer.js
+++ b/lib/internal/buffer.js
@@ -1,5 +1,7 @@
 'use strict';
 
+const errors = require('internal/errors');
+
 if (!process.binding('config').hasIntl) {
   return;
 }
@@ -24,7 +26,7 @@ exports.transcode = function transcode(source, fromEncoding, toEncoding) {
     return result;
 
   const code = icu.icuErrName(result);
-  const err = new Error(`Unable to transcode Buffer [${code}]`);
+  const err = new errors.Error('ERR_UNABLE_TRSC_BUFF',code);
   err.code = code;
   err.errno = result;
   throw err;
diff --git a/lib/internal/errors.js b/lib/internal/errors.js
index f2376f70371c60..7f65062f53120e 100644
--- a/lib/internal/errors.js
+++ b/lib/internal/errors.js
@@ -86,3 +86,4 @@ module.exports = exports = {
 // Note: Please try to keep these in alphabetical order
 E('ERR_ASSERTION', (msg) => msg);
 // Add new errors from here...
+E('ERR_UNABLE_TRSC_BUFF', `Unable to transcode Buffer [%s]`);
diff --git a/lib/internal/net.js b/lib/internal/net.js
index d19bc4c219a796..94ca49418e1888 100644
--- a/lib/internal/net.js
+++ b/lib/internal/net.js
@@ -1,5 +1,7 @@
 'use strict';
 
+const errors = require('internal/errors');
+
 module.exports = { isLegalPort, assertPort };
 
 // Check that the port number is not NaN when coerced to a number,
@@ -14,5 +16,5 @@ function isLegalPort(port) {
 
 function assertPort(port) {
   if (typeof port !== 'undefined' && !isLegalPort(port))
-    throw new RangeError('"port" argument must be >= 0 and < 65536');
+    throw errors.RangeError('ERR_PORT_ARGUMENT',port);
 }