diff --git a/module/finc/src/finc/RecordDriver/SolrMarcFincTrait.php b/module/finc/src/finc/RecordDriver/SolrMarcFincTrait.php
index d5d0936fd951e11041ab9ea603a9237bb70ce549..b4eae0673e02df0c41a3889b94bcc8fa9639e977 100644
--- a/module/finc/src/finc/RecordDriver/SolrMarcFincTrait.php
+++ b/module/finc/src/finc/RecordDriver/SolrMarcFincTrait.php
@@ -1100,7 +1100,7 @@ trait SolrMarcFincTrait
         // rearrange return array to collect same subjects below on unique key
         $array = [];
         foreach ($retval as $item) {
-            $array[(sha1($item['subject']))][] = $item;
+            $array[$item['subject']][] = $item;
         }
         return $array;
     }