diff --git a/doc/api/addons.markdown b/doc/api/addons.markdown
index 986c151097ee78..93ece69d738275 100644
--- a/doc/api/addons.markdown
+++ b/doc/api/addons.markdown
@@ -364,7 +364,7 @@ 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 c9bb58ebeae0d6..5380719180ea35 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');