diff --git a/src/pg/sql/41_observatory_augmentation.sql b/src/pg/sql/41_observatory_augmentation.sql
index d41a429..9267bc6 100644
--- a/src/pg/sql/41_observatory_augmentation.sql
+++ b/src/pg/sql/41_observatory_augmentation.sql
@@ -556,7 +556,6 @@ DECLARE
   denominator_id TEXT;
   names TEXT[];
   vals TEXT[];
-  denominator_id TEXT;
 BEGIN
 
   IF boundary_id IS NULL THEN