diff --git a/app/dao/notifications_dao.py b/app/dao/notifications_dao.py
index 2c9dca604..7df225561 100644
--- a/app/dao/notifications_dao.py
+++ b/app/dao/notifications_dao.py
@@ -1,4 +1,4 @@
-from sqlalchemy import (desc, func, Integer, or_, asc)
+from sqlalchemy import (desc, func, Integer, or_, and_, asc)
 from sqlalchemy.sql.expression import cast
 
 from datetime import (
@@ -62,11 +62,13 @@ def dao_get_potential_notification_statistics_for_day(day):
         Service.id,
         NotificationStatistics
     ).outerjoin(
-        Service.service_notification_stats
-    ).filter(
-        or_(
-            NotificationStatistics.day == day,
-            NotificationStatistics.day == None  # noqa
+        NotificationStatistics,
+        and_(
+            Service.id == NotificationStatistics.service_id,
+            or_(
+                NotificationStatistics.day == day,
+                NotificationStatistics.day == None  # noqa
+            )
         )
     ).order_by(
         asc(Service.created_at)
diff --git a/tests/app/notifications/rest/test_notification_statistics.py b/tests/app/notifications/rest/test_notification_statistics.py
index ec7a0ba0f..769fd7395 100644
--- a/tests/app/notifications/rest/test_notification_statistics.py
+++ b/tests/app/notifications/rest/test_notification_statistics.py
@@ -194,3 +194,32 @@ def test_get_notification_statistics_returns_both_existing_stats_and_generated_z
             assert generated_stats['service'] == str(service_without_stats.id)
 
             assert response.status_code == 200
+
+
+@freeze_time('1955-11-05T12:00:00')
+def test_get_notification_statistics_returns_zeros_when_only_stats_for_different_date(
+    notify_api,
+    sample_notification_statistics
+):
+    with notify_api.test_request_context():
+        with notify_api.test_client() as client:
+            with freeze_time('1985-10-26T00:06:00'):
+                auth_header = create_authorization_header(
+                    service_id=sample_notification_statistics.service_id
+                )
+                response = client.get(
+                    '/notifications/statistics?day={}'.format(date.today().isoformat()),
+                    headers=[auth_header]
+                )
+
+            notifications = json.loads(response.get_data(as_text=True))
+
+            assert response.status_code == 200
+            assert len(notifications['data']) == 1
+            assert notifications['data'][0]['emails_requested'] == 0
+            assert notifications['data'][0]['emails_delivered'] == 0
+            assert notifications['data'][0]['emails_failed'] == 0
+            assert notifications['data'][0]['sms_requested'] == 0
+            assert notifications['data'][0]['sms_delivered'] == 0
+            assert notifications['data'][0]['sms_failed'] == 0
+            assert notifications['data'][0]['service'] == str(sample_notification_statistics.service_id)