diff --git a/module/group/model.php b/module/group/model.php
index af1eb74efc..97452ad313 100644
--- a/module/group/model.php
+++ b/module/group/model.php
@@ -156,6 +156,22 @@ class groupModel extends model
             ->fetchAll('id');
     }
 
+    /**
+     * Get groups by accounts.
+     *
+     * @param  array  $accounts
+     * @access public
+     * @return array
+     */
+    public function getByAccounts($accounts)
+    {
+        return $this->dao->select('t1.account, t2.acl, t2.id')->from(TABLE_USERGROUP)->alias('t1')
+            ->leftJoin(TABLE_GROUP)->alias('t2')
+            ->on('t1.`group` = t2.id')
+            ->where('t1.account')->in($accounts)
+            ->fetchGroup('account');
+    }
+
     /**
      * Get the account number in the group.
      *
diff --git a/module/personnel/model.php b/module/personnel/model.php
index ccebd2a183..fd74fdad76 100644
--- a/module/personnel/model.php
+++ b/module/personnel/model.php
@@ -830,15 +830,15 @@ class personnelModel extends model
      */
     public function deleteWhitelist($users = array(), $objectType = 'program', $objectID = 0, $groupID = 0)
     {
-        $this->loadModel('group');
+        $groups = $this->loadModel('group')->getByAccounts($users);
 
         /* Determine whether to delete the whitelist. */
         foreach($users as $account)
         {
-            $groups = $this->group->getByAccount($account);
-            foreach($groups as $key => $group)
+            $groups = zget($groups, $account, array());
+            foreach($groups as $group)
             {
-                if($key == $groupID) continue;
+                if($group->id == $groupID) continue;
 
                 $acl     = json_decode($group->acl);
                 $keyName = $objectType . 's';