diff --git a/changelog.d/8850.misc b/changelog.d/8850.misc
new file mode 100644
index 000000000000..4b54b8dd871a
--- /dev/null
+++ b/changelog.d/8850.misc
@@ -0,0 +1 @@
+Add missing `ordering` to background database updates.
diff --git a/synapse/storage/databases/main/schema/delta/58/07add_method_to_thumbnail_constraint.sql.postgres b/synapse/storage/databases/main/schema/delta/58/07add_method_to_thumbnail_constraint.sql.postgres
index b64926e9c9eb..bd3feec2c11b 100644
--- a/synapse/storage/databases/main/schema/delta/58/07add_method_to_thumbnail_constraint.sql.postgres
+++ b/synapse/storage/databases/main/schema/delta/58/07add_method_to_thumbnail_constraint.sql.postgres
@@ -20,14 +20,14 @@
  */
 
 -- add new index that includes method to local media
-INSERT INTO background_updates (update_name, progress_json) VALUES
-  ('local_media_repository_thumbnails_method_idx', '{}');
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+  (5805, 'local_media_repository_thumbnails_method_idx', '{}');
 
 -- add new index that includes method to remote media
-INSERT INTO background_updates (update_name, progress_json, depends_on) VALUES
-  ('remote_media_repository_thumbnails_method_idx', '{}', 'local_media_repository_thumbnails_method_idx');
+INSERT INTO background_updates (ordering, update_name, progress_json, depends_on) VALUES
+  (5805, 'remote_media_repository_thumbnails_method_idx', '{}', 'local_media_repository_thumbnails_method_idx');
 
 -- drop old index
-INSERT INTO background_updates (update_name, progress_json, depends_on) VALUES
-  ('media_repository_drop_index_wo_method', '{}', 'remote_media_repository_thumbnails_method_idx');
+INSERT INTO background_updates (ordering, update_name, progress_json, depends_on) VALUES
+  (5805, 'media_repository_drop_index_wo_method', '{}', 'remote_media_repository_thumbnails_method_idx');
 
diff --git a/synapse/storage/databases/main/schema/delta/58/12room_stats.sql b/synapse/storage/databases/main/schema/delta/58/12room_stats.sql
index cade5dcca806..fd733adf13e6 100644
--- a/synapse/storage/databases/main/schema/delta/58/12room_stats.sql
+++ b/synapse/storage/databases/main/schema/delta/58/12room_stats.sql
@@ -28,5 +28,5 @@
 -- functionality as the old one. This effectively restarts the background job
 -- from the beginning, without running it twice in a row, supporting both
 -- upgrade usecases.
-INSERT INTO background_updates (update_name, progress_json) VALUES
-    ('populate_stats_process_rooms_2', '{}');
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+    (5812, 'populate_stats_process_rooms_2', '{}');
diff --git a/synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql b/synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql
index a2842687f19b..e1a35be8311b 100644
--- a/synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql
+++ b/synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql
@@ -1,2 +1,2 @@
-INSERT INTO background_updates (update_name, progress_json) VALUES
-  ('users_have_local_media', '{}');
\ No newline at end of file
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+  (5822, 'users_have_local_media', '{}');
diff --git a/synapse/storage/databases/main/schema/delta/58/23e2e_cross_signing_keys_idx.sql b/synapse/storage/databases/main/schema/delta/58/23e2e_cross_signing_keys_idx.sql
index 61c558db7703..75c3915a94eb 100644
--- a/synapse/storage/databases/main/schema/delta/58/23e2e_cross_signing_keys_idx.sql
+++ b/synapse/storage/databases/main/schema/delta/58/23e2e_cross_signing_keys_idx.sql
@@ -13,5 +13,5 @@
  * limitations under the License.
  */
 
-INSERT INTO background_updates (update_name, progress_json) VALUES
-  ('e2e_cross_signing_keys_idx', '{}');
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+  (5823, 'e2e_cross_signing_keys_idx', '{}');