diff --git a/1-js/05-data-types/03-string/article.md b/1-js/05-data-types/03-string/article.md
index b3e3029a..b8a8ac73 100644
--- a/1-js/05-data-types/03-string/article.md
+++ b/1-js/05-data-types/03-string/article.md
@@ -275,8 +275,8 @@ while ((pos = str.indexOf(target, pos + 1)) != -1) {
 */!*
 ```
 
-```smart header="`str.lastIndexOf(pos)`"
-There is also a similar method [str.lastIndexOf(pos)](mdn:js/String/lastIndexOf) that searches from the end of a string to its beginning.
+```smart header="`str.lastIndexOf(substr, position)`"
+There is also a similar method [str.lastIndexOf(substr, position)](mdn:js/String/lastIndexOf) that searches from the end of a string to its beginning.
 
 It would list the occurrences in the reverse order.
 ```