Really fix order_by()
diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index 936d114..4f89d78 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -2154,7 +2154,7 @@
 				$this->qb_orderby[$i] = $this->qb_orderby[$i]['field'].$this->qb_orderby[$i]['direction'];
 			}
 
-			$sql .= implode(', ', $this->qb_orderby);
+			return "\nORDER BY ".implode(', ', $this->qb_orderby);
 		}
 
 		return '';