diff --git a/doc/api/crypto.markdown b/doc/api/crypto.markdown
index dd31ae7ac3b92b..d6deed7d924759 100644
--- a/doc/api/crypto.markdown
+++ b/doc/api/crypto.markdown
@@ -325,19 +325,19 @@ const crypto = require('crypto');
 const assert = require('assert');
 
 // Generate Alice's keys...
-const alice = crypto.createDiffieHellman(11);
+const alice = crypto.createDiffieHellman(2048);
 const alice_key = alice.generateKeys();
 
 // Generate Bob's keys...
-const bob = crypto.createDiffieHellman(11);
+const bob = crypto.createDiffieHellman(alice.getPrime(), alice.getGenerator());
 const bob_key = bob.generateKeys();
 
 // Exchange and generate the secret...
 const alice_secret = alice.computeSecret(bob_key);
 const bob_secret = bob.computeSecret(alice_key);
 
-assert(alice_secret, bob_secret);
-  // OK
+// OK
+assert.equal(alice_secret.toString('hex'), bob_secret.toString('hex'));
 ```
 
 ### diffieHellman.computeSecret(other_public_key[, input_encoding][, output_encoding])