diff --git a/lib/_tls_wrap.js b/lib/_tls_wrap.js
index 9ecd92021de17f..a54bd0d0d35777 100644
--- a/lib/_tls_wrap.js
+++ b/lib/_tls_wrap.js
@@ -86,9 +86,10 @@ const {
 const {
   validateBuffer,
   validateCallback,
+  validateInt32,
   validateObject,
   validateString,
-  validateUint32
+  validateUint32,
 } = require('internal/validators');
 const {
   InternalX509Certificate
@@ -893,6 +894,7 @@ TLSSocket.prototype.exportKeyingMaterial = function(length, label, context) {
 };
 
 TLSSocket.prototype.setMaxSendFragment = function setMaxSendFragment(size) {
+  validateInt32(size, 'size');
   return this._handle.setMaxSendFragment(size) === 1;
 };
 
diff --git a/test/parallel/test-tls-max-send-fragment.js b/test/parallel/test-tls-max-send-fragment.js
index eca995d66483b5..bbb7849f005bf9 100644
--- a/test/parallel/test-tls-max-send-fragment.js
+++ b/test/parallel/test-tls-max-send-fragment.js
@@ -33,15 +33,38 @@ const buf = Buffer.allocUnsafe(10000);
 let received = 0;
 const maxChunk = 768;
 
+const invalidArgumentError = {
+  name: 'TypeError',
+  code: 'ERR_INVALID_ARG_TYPE'
+};
+
 const server = tls.createServer({
   key: fixtures.readKey('agent1-key.pem'),
   cert: fixtures.readKey('agent1-cert.pem')
 }, function(c) {
-  // Lower and upper limits
+
+  // No size is passed.
+  assert.throws(() => c.setMaxSendFragment(), invalidArgumentError);
+
+  // Invalid arg is passed.
+  [null, undefined, '', {}, false, true, []].forEach((arg) => {
+    assert.throws(() => c.setMaxSendFragment(arg), invalidArgumentError);
+  });
+
+  [NaN, Infinity, 2 ** 31].forEach((arg) => {
+    assert.throws(() => c.setMaxSendFragment(arg), {
+      name: 'RangeError',
+      code: 'ERR_OUT_OF_RANGE'
+    });
+  });
+
+  assert.throws(() => c.setMaxSendFragment(Symbol()), { name: 'TypeError' });
+
+  // Lower and upper limits.
   assert(!c.setMaxSendFragment(511));
   assert(!c.setMaxSendFragment(16385));
 
-  // Correct fragment size
+  // Correct fragment size.
   assert(c.setMaxSendFragment(maxChunk));
 
   c.end(buf);