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-rw-r--r--synapse/util/logcontext.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/util/logcontext.py b/synapse/util/logcontext.py
index 857afee7cb..183d9cf62f 100644
--- a/synapse/util/logcontext.py
+++ b/synapse/util/logcontext.py
@@ -315,6 +315,9 @@ def preserve_context_over_deferred(deferred, context=None):
     the deferred follow the synapse logcontext rules: try
     ``make_deferred_yieldable`` instead.
     """
+    if not isinstance(deferred, defer.Deferred):
+        return deferred
+
     if context is None:
         context = LoggingContext.current_context()
     d = _PreservingContextDeferred(context)