diff --git a/src/auditlog/models.py b/src/auditlog/models.py
index d4d7251..085dc67 100644
--- a/src/auditlog/models.py
+++ b/src/auditlog/models.py
@@ -160,7 +160,7 @@ class LogEntry(models.Model):
         )
 
     content_type = models.ForeignKey('contenttypes.ContentType', on_delete=models.CASCADE, related_name='+', verbose_name=_("content type"))
-    object_pk = models.TextField(verbose_name=_("object pk"), db_index=True)
+    object_pk = models.TextField(db_index=True, verbose_name=_("object pk"))
     object_id = models.BigIntegerField(blank=True, db_index=True, null=True, verbose_name=_("object id"))
     object_repr = models.TextField(verbose_name=_("object representation"))
     action = models.PositiveSmallIntegerField(choices=Action.choices, verbose_name=_("action"))