diff --git a/logcat/event-log-tags b/logcat/event-log-tags
index f9355ec18..e13a71158 100644
--- a/logcat/event-log-tags
+++ b/logcat/event-log-tags
@@ -350,3 +350,6 @@
 # browser stats for diary study
 70101 browser_zoom_level_change (start level|1|5),(end level|1|5),(time|2|3)
 70102 browser_double_tap_duration (duration|1|3),(time|2|3)
+
+# aggregation service
+70200 aggregation (aggregation time|2|3)