diff --git a/constants.cc b/constants.cc
index b68bd04..4129176 100644
--- a/constants.cc
+++ b/constants.cc
@@ -9,7 +9,7 @@
 const char kPowerwashMarkerFile[] =
     "/mnt/stateful_partition/factory_install_reset";
 
-const char kPowerwashCommand[] = "safe fast keepimg\n";
+const char kPowerwashCommand[] = "safe fast keepimg reason=update_engine\n";
 
 const char kPowerwashSafePrefsDir[] =
     "/mnt/stateful_partition/unencrypted/preserve/update_engine/prefs";