diff --git a/sql/upgrades/151.sql b/sql/upgrades/151.sql
index 3399d014..4af0220c 100644
--- a/sql/upgrades/151.sql
+++ b/sql/upgrades/151.sql
@@ -1,15 +1,13 @@
 -- SWH DB schema upgrade
 -- from_version: 150
 -- to_version: 151
 -- description: Drop unused functions
 
 -- latest schema version
 insert into dbversion(version, release, description)
       values(151, now(), 'Work In Progress');
 
-drop function swh_skipped_content_missing;
 drop function swh_content_find;
 drop function swh_directory_missing;
-drop function swh_directory_entry_add;
 drop function swh_revision_walk;
 drop function swh_revision_list_children;