diff --git a/doc/api/crypto.md b/doc/api/crypto.md
index 67c4f8c165b6b9..19e46b89ac83a8 100644
--- a/doc/api/crypto.md
+++ b/doc/api/crypto.md
@@ -3665,7 +3665,7 @@ const {
   generateKey,
 } = await import('node:crypto');
 
-generateKey('hmac', { length: 64 }, (err, key) => {
+generateKey('hmac', { length: 512 }, (err, key) => {
   if (err) throw err;
   console.log(key.export().toString('hex'));  // 46e..........620
 });
@@ -3676,7 +3676,7 @@ const {
   generateKey,
 } = require('node:crypto');
 
-generateKey('hmac', { length: 64 }, (err, key) => {
+generateKey('hmac', { length: 512 }, (err, key) => {
   if (err) throw err;
   console.log(key.export().toString('hex'));  // 46e..........620
 });
@@ -3939,7 +3939,7 @@ const {
   generateKeySync,
 } = await import('node:crypto');
 
-const key = generateKeySync('hmac', { length: 64 });
+const key = generateKeySync('hmac', { length: 512 });
 console.log(key.export().toString('hex'));  // e89..........41e
 ```
 
@@ -3948,7 +3948,7 @@ const {
   generateKeySync,
 } = require('node:crypto');
 
-const key = generateKeySync('hmac', { length: 64 });
+const key = generateKeySync('hmac', { length: 512 });
 console.log(key.export().toString('hex'));  // e89..........41e
 ```