diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index d2cd646ba7b77..db64a9ad34bd1 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -14229,6 +14229,7 @@ public final class ActivityManagerService extends ActivityManagerNative
                     startHomeActivityLocked(userId);
                 }
 
+                EventLogTags.writeAmSwitchUser(userId);
                 getUserManagerLocked().userForeground(userId);
                 sendUserSwitchBroadcastsLocked(oldUserId, userId);
                 if (needStart) {
diff --git a/services/java/com/android/server/am/EventLogTags.logtags b/services/java/com/android/server/am/EventLogTags.logtags
index 6ee750710d6c6..88c0c0330d9b7 100644
--- a/services/java/com/android/server/am/EventLogTags.logtags
+++ b/services/java/com/android/server/am/EventLogTags.logtags
@@ -83,3 +83,6 @@ option java_package com.android.server.am
 30039 am_crash (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Exception|3),(Message|3),(File|3),(Line|1|5)
 # Log.wtf() called
 30040 am_wtf (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Tag|3),(Message|3)
+
+# User switched
+30041 am_switch_user (id|1|5)