diff --git a/plugins/views_plugin_query_default.inc b/plugins/views_plugin_query_default.inc
index a898d1f..e99df14 100644
--- a/plugins/views_plugin_query_default.inc
+++ b/plugins/views_plugin_query_default.inc
@@ -1045,6 +1045,12 @@ class views_plugin_query_default extends views_plugin_query {
       if (!empty($info['conditions'])) {
         $sub_group = $info['type'] == 'OR' ? db_or() : db_and();
         foreach ($info['conditions'] as $key => $clause) {
+          // DBTNG doesn't support to add the same subquery twice to the main
+          // query and the count query, so clone the subquery to have two instances
+          // of the same object. - http://drupal.org/node/1112854
+          if (is_object($clause['value']) && $clause['value'] instanceof SelectQuery) {
+            $clause['value'] = clone $clause['value'];
+          }
           if ($clause['operator'] == 'formula') {
             $has_condition = TRUE;
             $sub_group->where($clause['field'], $clause['value']);