diff --git a/src/python/src/grpc/_adapter/rear.py b/src/python/src/grpc/_adapter/rear.py
index d16fbeecf7bc6c6b7d917f9c450cd1482a8c5601..94ff66ffdada0ef97db8116f73a962f5efaf25f3 100644
--- a/src/python/src/grpc/_adapter/rear.py
+++ b/src/python/src/grpc/_adapter/rear.py
@@ -170,7 +170,8 @@ class RearLink(ticket_interfaces.RearLink, activated.Activated):
     if event.status.code is _low.Code.OK:
       category = tickets.Kind.COMPLETION
     elif event.status.code is _low.Code.CANCELLED:
-      category = tickets.Kind.CANCELLATION
+      # TODO(issue 752): Use a CANCELLATION ticket kind here.
+      category = tickets.Kind.SERVICER_FAILURE
     elif event.status.code is _low.Code.EXPIRED:
       category = tickets.Kind.EXPIRATION
     else: