diff --git a/src/pg/sql/41_observatory_augmentation.sql b/src/pg/sql/41_observatory_augmentation.sql
index 277cc00..e3796ee 100644
--- a/src/pg/sql/41_observatory_augmentation.sql
+++ b/src/pg/sql/41_observatory_augmentation.sql
@@ -471,10 +471,10 @@ BEGIN
     EXECUTE format(
        'WITH _overlaps AS (
           SELECT ST_Area(
-            ST_Intersection(%I, a.%I)
+            ST_Intersection(%L, a.%I)
           ) / ST_Area(a.%I) AS overlap_fraction, %I geomref
           FROM observatory.%I as a
-          WHERE %I && a.%I,
+          WHERE %L && a.%I,
         SELECT %I category
          FROM observatory.%I data
          WHERE data.%I = geomref