diff --git a/django_celery_results/migrations/0013_taskresult_django_cele_periodi_1993cf_idx.py b/django_celery_results/migrations/0013_taskresult_django_cele_periodi_1993cf_idx.py
new file mode 100644
index 0000000..9b1374b
--- /dev/null
+++ b/django_celery_results/migrations/0013_taskresult_django_cele_periodi_1993cf_idx.py
@@ -0,0 +1,20 @@
+# Generated by Django 5.1.3 on 2024-11-05 13:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_celery_results', '0012_taskresult_date_started'),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name='taskresult',
+            index=models.Index(
+                fields=['periodic_task_name'],
+                name='django_cele_periodi_1993cf_idx'
+            ),
+        ),
+    ]
diff --git a/django_celery_results/models.py b/django_celery_results/models.py
index db8986e..d2f34d5 100644
--- a/django_celery_results/models.py
+++ b/django_celery_results/models.py
@@ -115,6 +115,8 @@ class Meta:
                          name='django_cele_date_cr_f04a50_idx'),
             models.Index(fields=['date_done'],
                          name='django_cele_date_do_f59aad_idx'),
+            models.Index(fields=['periodic_task_name'],
+                         name='django_cele_periodi_1993cf_idx'),
         ]
 
     def as_dict(self):