diff --git a/src/TSentry.cpp b/src/TSentry.cpp
index 2ea874b..0d34a40 100644
--- a/src/TSentry.cpp
+++ b/src/TSentry.cpp
@@ -37,7 +37,11 @@ void TSentry::SetupUser() {
         return;
     }
     sentry_value_t user = sentry_value_new_object();
-    sentry_value_set_by_key(user, "id", sentry_value_new_string(Application::Settings.Key.c_str()));
+    if (Application::Settings.Key.size() == 36) {
+        sentry_value_set_by_key(user, "id", sentry_value_new_string(Application::Settings.Key.c_str()));
+    } else {
+        sentry_value_set_by_key(user, "id", sentry_value_new_string("unauthenticated"));
+    }
     sentry_set_user(user);
 }