diff --git a/README.md b/README.md
index 1689f28..12b4cf4 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ file basis using `ftplugin` or `autocmd`. For example, the `argwrap_tail_comma`
 
 *   **argwrap_tail_comma**
 
-    Specifies if the closing brace should be preceded with a comma when wrapping lines.
+    Specifies if any closing brace should be preceded with a comma when wrapping lines.
 
     *Tail comma disabled (default)*
 
@@ -99,6 +99,30 @@ file basis using `ftplugin` or `autocmd`. For example, the `argwrap_tail_comma`
     )
     ```
 
+*   **argwrap_tail_comma_braces**
+
+    Specifies which closing brace should be preceded with a comma when wrapping lines.
+
+    *Tail comma disabled (default)*
+
+    ```
+    Foo(
+        wibble,
+        wobble,
+        wubble
+    )
+    ```
+
+    *Tail comma enabled for square brackets only (`let g:argwrap_tail_comma_braces = '['`)*
+
+    ```
+    r = [
+        2,
+        3,
+        5,
+    ]
+    ```
+
 *   **argwrap_wrap_closing_brace**
 
     Specifies if the closing brace should be wrapped to a new line.