diff --git a/service-t/src/com/android/server/net/NetworkStatsRecorder.java b/service-t/src/com/android/server/net/NetworkStatsRecorder.java
index 7c801d7..3da1585 100644
--- a/service-t/src/com/android/server/net/NetworkStatsRecorder.java
+++ b/service-t/src/com/android/server/net/NetworkStatsRecorder.java
@@ -541,7 +541,8 @@
 
     /**
      * Recover from {@link FileRotator} failure by dumping state to
-     * {@link DropBoxManager} and deleting contents.
+     * {@link DropBoxManager} and deleting contents if this recorder
+     * sets {@code mWipeOnError} to true, otherwise keep the contents.
      */
     void recoverAndDeleteData() {
         if (DUMP_BEFORE_DELETE) {