diff --git a/README.md b/README.md
index dd71a56..81014d4 100644
--- a/README.md
+++ b/README.md
@@ -519,7 +519,10 @@ obsws-cli hotkey trigger-sequence OBS_KEY_F1 --shift --ctrl
 #### Filter
 
 -   list: List filters for a source.
+
+    *optional*
     -   args: <source_name>
+        -   defaults to current scene
 
 ```console
 obsws-cli filter list "Mic/Aux"