2 files changed, 2 insertions, 2 deletions
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 066ce18704..49c4b85054 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -144,4 +144,4 @@ class EventContentFields(object):
     """Fields found in events' content, regardless of type."""
 
     # Labels for the event, cf https://github.com/matrix-org/matrix-doc/pull/2326
-    Labels = "org.matrix.labels"
+    LABELS = "org.matrix.labels"
diff --git a/synapse/api/filtering.py b/synapse/api/filtering.py
index 30a7ee0a7a..bec13f08d8 100644
--- a/synapse/api/filtering.py
+++ b/synapse/api/filtering.py
@@ -309,7 +309,7 @@ class Filter(object):
             content = event.get("content", {})
             # check if there is a string url field in the content for filtering purposes
             contains_url = isinstance(content.get("url"), text_type)
-            labels = content.get(EventContentFields.Labels, [])
+            labels = content.get(EventContentFields.LABELS, [])
 
         return self.check_fields(room_id, sender, ev_type, labels, contains_url)