diff --git a/libraries/classes/Display/Results.php b/libraries/classes/Display/Results.php
index 14fd6714fb..4b3b3e4608 100644
--- a/libraries/classes/Display/Results.php
+++ b/libraries/classes/Display/Results.php
@@ -1856,6 +1856,7 @@ class Results
             'db'                 => $this->__get('db'),
             'table'              => $this->__get('table'),
             'sql_query'          => $single_sorted_sql_query,
+            'sql_signature'      => Core::signSqlQuery($single_sorted_sql_query),
             'session_max_rows'   => $session_max_rows,
             'is_browse_distinct' => $this->__get('is_browse_distinct'),
         );
@@ -1864,6 +1865,7 @@ class Results
             'db'                 => $this->__get('db'),
             'table'              => $this->__get('table'),
             'sql_query'          => $multi_sorted_sql_query,
+            'sql_signature'      => Core::signSqlQuery($multi_sorted_sql_query),
             'session_max_rows'   => $session_max_rows,
             'is_browse_distinct' => $this->__get('is_browse_distinct'),
         );