diff --git a/api/src/engine/connectors/datashield/transformations.ts b/api/src/engine/connectors/datashield/transformations.ts
index db452ef8376aaf454d4eca8c14646848d2bd1c42..88c7abce38bce6f9774d123bc1255656bf017355 100644
--- a/api/src/engine/connectors/datashield/transformations.ts
+++ b/api/src/engine/connectors/datashield/transformations.ts
@@ -76,7 +76,7 @@ export const transformToTable = jsonata(`
   },
   "data": $.$each(function($v, $k) {
          $not($k in $params) ? $append($k,$v.*) : undefined
-      })
+      })[]
 })
 `);