diff --git a/doc/api/addons.markdown b/doc/api/addons.markdown
index f0ec1c3a1e2a91..c9aea3915cba65 100644
--- a/doc/api/addons.markdown
+++ b/doc/api/addons.markdown
@@ -366,7 +366,7 @@ adding the function as a property of `exports`.
 
 To test it, run the following JavaScript:
 
-```cpp
+```js
 // test.js
 const addon = require('./build/Release/addon');
 
diff --git a/doc/api/crypto.markdown b/doc/api/crypto.markdown
index f37fcfa8e95653..0b97e0b6a1c7d5 100644
--- a/doc/api/crypto.markdown
+++ b/doc/api/crypto.markdown
@@ -235,7 +235,7 @@ decipher.end();
 
 Example: Using `Decipher` and piped streams:
 
-```
+```js
 const crypto = require('crypto');
 const fs = require('fs');
 const decipher = crypto.createDecipher('aes192', 'a password');