diff --git a/docs/development/synapse_architecture/cancellation.md b/docs/development/synapse_architecture/cancellation.md
index 232fe8a565..6b0d97b03e 100644
--- a/docs/development/synapse_architecture/cancellation.md
+++ b/docs/development/synapse_architecture/cancellation.md
@@ -374,7 +374,7 @@ async def do_something() -> None:
         # `do_something_else` will get its own independent
         # logging context. `request-1` will not count any
         # metrics from `do_something_else`.
-        run_as_background_process( # type: ignore[unused-awaitable]
+        run_as_background_process(  # type: ignore[unused-awaitable]
             "do_something_else",
             do_something_else,
             to_resolve,