diff --git a/fastapi/cli.py b/fastapi/cli.py
index 8d3301e9d..fb735c794 100644
--- a/fastapi/cli.py
+++ b/fastapi/cli.py
@@ -11,3 +11,6 @@ def main() -> None:
         print(message)
         raise RuntimeError(message)  # noqa: B904
     cli_main()
+
+
+import sys
\ No newline at end of file