diff --git a/lib/dgram.js b/lib/dgram.js
index 0d93ca28748e87..55753b177279a9 100644
--- a/lib/dgram.js
+++ b/lib/dgram.js
@@ -524,35 +524,31 @@ Socket.prototype.setBroadcast = function(arg) {
 };
 
 
-Socket.prototype.setTTL = function(arg) {
-  if (typeof arg !== 'number') {
-    throw new errors.TypeError('ERR_INVALID_ARG_TYPE',
-                               'arg',
-                               'number');
+Socket.prototype.setTTL = function(ttl) {
+  if (typeof ttl !== 'number') {
+    throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'ttl', 'number', ttl);
   }
 
-  var err = this._handle.setTTL(arg);
+  var err = this._handle.setTTL(ttl);
   if (err) {
     throw errnoException(err, 'setTTL');
   }
 
-  return arg;
+  return ttl;
 };
 
 
-Socket.prototype.setMulticastTTL = function(arg) {
-  if (typeof arg !== 'number') {
-    throw new errors.TypeError('ERR_INVALID_ARG_TYPE',
-                               'arg',
-                               'number');
+Socket.prototype.setMulticastTTL = function(ttl) {
+  if (typeof ttl !== 'number') {
+    throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'ttl', 'number', ttl);
   }
 
-  var err = this._handle.setMulticastTTL(arg);
+  var err = this._handle.setMulticastTTL(ttl);
   if (err) {
     throw errnoException(err, 'setMulticastTTL');
   }
 
-  return arg;
+  return ttl;
 };
 
 
diff --git a/test/parallel/test-dgram-multicast-setTTL.js b/test/parallel/test-dgram-multicast-setTTL.js
index b7d1e01b321ac7..bd04ce4f32bde6 100644
--- a/test/parallel/test-dgram-multicast-setTTL.js
+++ b/test/parallel/test-dgram-multicast-setTTL.js
@@ -40,7 +40,7 @@ socket.on('listening', common.mustCall(() => {
   }, common.expectsError({
     code: 'ERR_INVALID_ARG_TYPE',
     type: TypeError,
-    message: /^The "arg" argument must be of type number$/
+    message: 'The "ttl" argument must be of type number. Received type string'
   }));
 
   //close the socket
diff --git a/test/parallel/test-dgram-setTTL.js b/test/parallel/test-dgram-setTTL.js
index c061fbc1870d9e..840a3f4d09f43a 100644
--- a/test/parallel/test-dgram-setTTL.js
+++ b/test/parallel/test-dgram-setTTL.js
@@ -14,7 +14,7 @@ socket.on('listening', common.mustCall(() => {
   }, common.expectsError({
     code: 'ERR_INVALID_ARG_TYPE',
     type: TypeError,
-    message: /^The "arg" argument must be of type number$/
+    message: 'The "ttl" argument must be of type number. Received type string'
   }));
 
   // TTL must be a number from > 0 to < 256