diff --git a/common/djangoapps/track/backends/logger.py b/common/djangoapps/track/backends/logger.py
index a48ee1cf42..da9b960d0f 100644
--- a/common/djangoapps/track/backends/logger.py
+++ b/common/djangoapps/track/backends/logger.py
@@ -38,8 +38,7 @@ class LoggerBackend(BaseBackend):
             event_str = json.dumps(event, cls=DateTimeJSONEncoder)
         except UnicodeDecodeError:
             application_log.exception(
-                "UnicodeDecodeError Event_type: %r, Event_source: %r, Page: %r, Referer: %r",
-                event.get('event_type'), event.get('event_source'), event.get('page'), event.get('referer')
+                "UnicodeDecodeError Event_data: %r", event
             )
             raise