diff --git a/doc/api/util.md b/doc/api/util.md
index af75ecb9f62cc6..dc023cfa96a4a9 100644
--- a/doc/api/util.md
+++ b/doc/api/util.md
@@ -1328,7 +1328,7 @@ const { params } = new MIMEType('text/plain;foo=0;bar=1');
 params.set('foo', 'def');
 params.set('baz', 'xyz');
 console.log(params.toString());
-// Prints: foo=def&bar=1&baz=xyz
+// Prints: foo=def;bar=1;baz=xyz
 ```
 
 ```cjs
@@ -1338,7 +1338,7 @@ const { params } = new MIMEType('text/plain;foo=0;bar=1');
 params.set('foo', 'def');
 params.set('baz', 'xyz');
 console.log(params.toString());
-// Prints: foo=def&bar=1&baz=xyz
+// Prints: foo=def;bar=1;baz=xyz
 ```
 
 ### `mimeParams.values()`