diff --git a/borgmatic/commands/completion.py b/borgmatic/commands/completion.py
index eb45799f..d24c0430 100644
--- a/borgmatic/commands/completion.py
+++ b/borgmatic/commands/completion.py
@@ -89,6 +89,7 @@ def has_required_param_options(action: Action):
         )
         or '--archive' in action.option_strings
         or action.metavar in ('PATTERN', 'KEYS', 'N')
+        or (action.type is not None and action.default is None)
     )