diff --git a/constituentsonly.php b/constituentsonly.php
index 281f812..d77cd31 100644
--- a/constituentsonly.php
+++ b/constituentsonly.php
@@ -146,33 +146,12 @@ function constituentsonly_civicrm_apiWrappers(&$wrappers, $apiRequest) {
 }
 
 /**
- * Implements hook_civicrm_alterReportVar().
+ * Implements hook_civicrm_selectWhereClause().
  *
- * @link http://wiki.civicrm.org/confluence/display/CRMDOC/hook_civicrm_alterReportVar
+ * @link http://wiki.civicrm.org/confluence/display/CRMDOC/hook_civicrm_selectWhereClause
  */
-function constituentsonly_civicrm_alterReportVar($varType, &$var, &$object) {
-  $instanceValue = $object->getVar('_instanceValues');
-  if (!empty($instanceValue) &&
-    in_array(
-      $instanceValue['report_id'],
-      array(
-        'contact/summary',
-        'contact/detail',
-        'contact/currentEmployer',
-      )
-    )
-  ) {
-    if ($varType == 'sql') {
-      $var->_columnHeaders['civicrm_contact_do_not_trade'] = array(
-        'type' => 1,
-        'title' => 'Constituent',
-        'no_display' => TRUE,
-      );
-      $var->_select .= ' , contact_civireport.do_not_trade as civicrm_contact_do_not_trade ';
-
-      $where = $var->getVar('_where');
-      $where .= ' AND contact_civireport.do_not_trade <> 1';
-      $var->setVar('_where', $where);
-    }
+function constituentsonly_civicrm_selectWhereClause($entity, &$clauses) {
+  if ($entity == 'Contact') {
+    $clauses['do_not_trade'] = ' = 0';
   }
 }