diff --git a/migrations/006.controls.up.sql b/migrations/006.controls.up.sql
index 23142671..1d06a1d5 100644
--- a/migrations/006.controls.up.sql
+++ b/migrations/006.controls.up.sql
@@ -36,7 +36,7 @@ AS ENUM ('Extended',
     'Reduced');
 
 ALTER TABLE buildings
-    ADD COLUMN IF NOT EXISTS planning_conservation_area_update_type DEFAULT 'Unknown';
+    ADD COLUMN IF NOT EXISTS planning_conservation_area_update_type planning_conservation_area_update_type DEFAULT 'Unknown';
 
 -- Listed (bool, list id)
 -- e.g. https://historicengland.org.uk/listing/the-list/list-entry/1294614