diff --git a/CHANGELOG.md b/CHANGELOG.md
index b84bfc7..ca6a872 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
 - fix: Display `created` timestamp in server timezone ([#404](https://github.com/jazzband/django-auditlog/pull/404))
 - fix: Handle port in `remote_addr` ([#417](https://github.com/jazzband/django-auditlog/pull/417))
 - fix: Handle the error with AttributeError: 'OneToOneRel' error occur during a `PolymorphicModel` has relation with other models  ([#429](https://github.com/jazzband/django-auditlog/pull/429))
+- fix: Support search by custom USERNAME_FIELD ([#432](https://github.com/jazzband/django-auditlog/pull/432))
 
 ## 2.1.1 (2022-07-27)
 
diff --git a/auditlog/admin.py b/auditlog/admin.py
index 2d79675..ee868e2 100644
--- a/auditlog/admin.py
+++ b/auditlog/admin.py
@@ -1,4 +1,5 @@
 from django.contrib import admin
+from django.contrib.auth import get_user_model
 
 from auditlog.filters import ResourceTypeFilter
 from auditlog.mixins import LogEntryAdminMixin
@@ -14,7 +15,7 @@ class LogEntryAdmin(admin.ModelAdmin, LogEntryAdminMixin):
         "changes",
         "actor__first_name",
         "actor__last_name",
-        "actor__username",
+        f"actor__{get_user_model().USERNAME_FIELD}",
     ]
     list_filter = ["action", ResourceTypeFilter]
     readonly_fields = ["created", "resource_url", "action", "user_url", "msg"]