diff --git a/docs/crashlytics/usage.mdx b/docs/crashlytics/usage.mdx
index b85c387725c4..96be3419e993 100644
--- a/docs/crashlytics/usage.mdx
+++ b/docs/crashlytics/usage.mdx
@@ -150,6 +150,7 @@ To add user IDs to your reports, assign each user with a unique ID. This can be
 ```dart
 FirebaseCrashlytics.instance.setUserIdentifier("12345");
 ```
+To reset a user ID (for example when a user logs out) set the user ID to an empty string.
 
 ## Handling uncaught errors