diff --git a/server/migrations/012_inbox_actor.up.sql b/server/migrations/012_inbox_actor.up.sql
index 81afe758..5784870b 100644
--- a/server/migrations/012_inbox_actor.up.sql
+++ b/server/migrations/012_inbox_actor.up.sql
@@ -1,2 +1,2 @@
-ALTER TABLE inbox_item ADD COLUMN actor_type TEXT;
-ALTER TABLE inbox_item ADD COLUMN actor_id UUID;
+ALTER TABLE inbox_item ADD COLUMN IF NOT EXISTS actor_type TEXT;
+ALTER TABLE inbox_item ADD COLUMN IF NOT EXISTS actor_id UUID;