diff --git a/backend/alembic/versions/0069_job_index_hygiene.py b/backend/alembic/versions/0069_job_index_hygiene.py
index fbc7d878..59370115 100644
--- a/backend/alembic/versions/0069_job_index_hygiene.py
+++ b/backend/alembic/versions/0069_job_index_hygiene.py
@@ -45,14 +45,17 @@ def upgrade() -> None:
         op.execute("DROP INDEX CONCURRENTLY IF EXISTS ix_videos_is_short")
         op.execute("DROP INDEX CONCURRENTLY IF EXISTS ix_videos_via_explore")
         op.execute("DROP INDEX CONCURRENTLY IF EXISTS ix_videos_via_search")
+        # Predicate MUST match the query's `.is_(True)`/`.is_(False)` form (SQL `IS TRUE`/`IS FALSE`):
+        # Postgres's partial-index prover does NOT match a `col IS TRUE` clause to a bare `col` predicate,
+        # so `WHERE via_search` / `WHERE NOT shorts_probed` would leave the queries seq-scanning.
         op.execute(
             "CREATE INDEX CONCURRENTLY IF NOT EXISTS ix_videos_via_search "
-            "ON videos (id) WHERE via_search"
+            "ON videos (id) WHERE via_search IS TRUE"
         )
         op.execute("DROP INDEX CONCURRENTLY IF EXISTS ix_videos_shorts_probed")
         op.execute(
             "CREATE INDEX CONCURRENTLY IF NOT EXISTS ix_videos_shorts_probed "
-            "ON videos (id) WHERE NOT shorts_probed"
+            "ON videos (id) WHERE shorts_probed IS FALSE"
         )
         op.execute("DROP INDEX CONCURRENTLY IF EXISTS ix_videos_unavailable_since")
         op.execute(