diff --git a/docs/api/webview-tag.md b/docs/api/webview-tag.md
index 4dad26a8dd5b..5fcc3bffd4e6 100644
--- a/docs/api/webview-tag.md
+++ b/docs/api/webview-tag.md
@@ -402,7 +402,7 @@ Returns `String` - The user agent for guest page.
 
 Injects CSS into the guest page.
 
-### `<webview>.executeJavaScript(code, userGesture, callback)`
+### `<webview>.executeJavaScript(code[, userGesture, callback])`
 
 * `code` String
 * `userGesture` Boolean (optional) - Default `false`.