diff --git a/xbstrap/__init__.py b/xbstrap/__init__.py
index ef5c7d4..3b5b09b 100755
--- a/xbstrap/__init__.py
+++ b/xbstrap/__init__.py
@@ -991,7 +991,9 @@ def main():
         elif args.command == "lsp":
             do_lsp(args)
         else:
-            assert not "Unexpected command"
+            # invalid command are already handled by argparse;
+            # this only gets tripped with no command provided
+            main_parser.print_help()
     except (
         xbstrap.base.ExecutionFailureError,
         xbstrap.base.PlanFailureError,