1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index bc04a0755b..8aa646890d 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -198,6 +198,9 @@ class LimitBlockingTypes:
 class EventContentFields:
     """Fields found in events' content, regardless of type."""
 
+    # Synapse internal content field for tracing
+    TRACING_CONTEXT: Final = "org.matrix.tracing_context"
+
     # Labels for the event, cf https://github.com/matrix-org/matrix-doc/pull/2326
     LABELS: Final = "org.matrix.labels"