diff --git a/docs/api/ipc-renderer.md b/docs/api/ipc-renderer.md
index 9a98f14aad2..e23f3734e5e 100644
--- a/docs/api/ipc-renderer.md
+++ b/docs/api/ipc-renderer.md
@@ -40,9 +40,9 @@ only the next time a message is sent to `channel`, after which it is removed.
 Removes the specified `listener` from the listener array for the specified
 `channel`.
 
-### `ipcRenderer.removeAllListeners([channel])`
+### `ipcRenderer.removeAllListeners(channel)`
 
-* `channel` String (optional)
+* `channel` String
 
 Removes all listeners, or those of the specified `channel`.