diff --git a/rich/console.py b/rich/console.py
index 6a0b3e90..f78f200b 100644
--- a/rich/console.py
+++ b/rich/console.py
@@ -265,7 +265,9 @@ class ConsoleOptions:
 class RichCast(Protocol):
     """An object that may be 'cast' to a console renderable."""
 
-    def __rich__(self) -> Union["ConsoleRenderable", str]:  # pragma: no cover
+    def __rich__(
+        self,
+    ) -> Union["ConsoleRenderable", "RichCast", str]:  # pragma: no cover
         ...