diff --git a/doc/api/util.md b/doc/api/util.md
index 9cca721e63c..c0ca4b930d9 100644
--- a/doc/api/util.md
+++ b/doc/api/util.md
@@ -461,6 +461,7 @@ added: v8.0.0
 -->
 
 * `original` {Function}
+* Returns: {Function}
 
 Takes a function following the common Node.js callback style, i.e. taking a
 `(err, value) => ...` callback as the last argument, and returns a version