1 files changed, 4 insertions, 1 deletions
diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py
index 57cac22252..789431ef25 100644
--- a/synapse/rest/admin/__init__.py
+++ b/synapse/rest/admin/__init__.py
@@ -57,6 +57,7 @@ from synapse.rest.admin.users import (
     UsersRestServletV2,
     WhoisRestServlet,
 )
+from synapse.types import RoomStreamToken
 from synapse.util.versionstring import get_version_string
 
 logger = logging.getLogger(__name__)
@@ -109,7 +110,9 @@ class PurgeHistoryRestServlet(RestServlet):
             if event.room_id != room_id:
                 raise SynapseError(400, "Event is for wrong room.")
 
-            room_token = await self.store.get_topological_token_for_event(event_id)
+            room_token = RoomStreamToken(
+                event.depth, event.internal_metadata.stream_ordering
+            )
             token = await room_token.to_string(self.store)
 
             logger.info("[purge] purging up to token %s (event_id %s)", token, event_id)