1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/metrics/background_process_metrics.py b/synapse/metrics/background_process_metrics.py
index eef3462e10..7a1516d3a8 100644
--- a/synapse/metrics/background_process_metrics.py
+++ b/synapse/metrics/background_process_metrics.py
@@ -235,7 +235,7 @@ def run_as_background_process(
                         f"bgproc.{desc}", tags={SynapseTags.REQUEST_ID: str(context)}
                     )
                 else:
-                    ctx = nullcontext()
+                    ctx = nullcontext()  # type: ignore[assignment]
                 with ctx:
                     return await func(*args, **kwargs)
             except Exception: