diff --git a/doc/api/buffer.md b/doc/api/buffer.md
index a36d007f0abcc6..0d370410ed2a99 100644
--- a/doc/api/buffer.md
+++ b/doc/api/buffer.md
@@ -752,7 +752,7 @@ console.log(Buffer.isEncoding(''));
 // Prints: false
 ```
 
-### Class Property: `Buffer.poolSize`
+### Class property: `Buffer.poolSize`
 <!-- YAML
 added: v0.11.3
 -->
diff --git a/tools/doc/json.js b/tools/doc/json.js
index 6dd25d41026f84..5677fd1ce8b664 100644
--- a/tools/doc/json.js
+++ b/tools/doc/json.js
@@ -437,7 +437,7 @@ const eventPrefix = '^Event: +';
 const classPrefix = '^[Cc]lass: +';
 const ctorPrefix = '^(?:[Cc]onstructor: +)?`?new +';
 const classMethodPrefix = '^Static method: +';
-const maybeClassPropertyPrefix = '(?:Class Property: +)?';
+const maybeClassPropertyPrefix = '(?:Class property: +)?';
 
 const maybeQuote = '[\'"]?';
 const notQuotes = '[^\'"]+';