diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index 4959284..54fb50f 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -599,7 +599,7 @@
 		$where_in = array();
 		foreach ($values as $value)
 		{
-			$wherein[] = $this->escape($value);
+			$where_in[] = $this->escape($value);
 		}
 
 		$prefix = (count($this->qb_where) === 0) ? $this->_group_get_type('') : $this->_group_get_type($type);