diff --git a/oxrlib/config.py b/oxrlib/config.py
index 5110ab17a181c78450a50dd9e379f26d3fffdada..c5b7df67945c1a28da97693f68084e5abea61cf6 100644
--- a/oxrlib/config.py
+++ b/oxrlib/config.py
@@ -110,8 +110,9 @@ class Configuration:
         hist_parser.add_argument(
             '--output-format',
             type=historical.Formats.from_arg,
-            choices=[fmt.name.lower() for fmt in historical.Formats],
-            help="Output format. Choices are %(choices)s. Default `raw`.",
+            help="Output format."
+            " Choices are `raw`, `ledger`, `beancount`."
+            " Default `raw`.",
         )
         # --ledger and --no-ledger predate --output-format.
         hist_parser.add_argument(