diff --git a/framework/grid/Column.php b/framework/grid/Column.php
index a5e89f8..2e9f0e2 100644
--- a/framework/grid/Column.php
+++ b/framework/grid/Column.php
@@ -131,6 +131,7 @@ class Column extends Object
      * Returns header cell label.
      * This method may be overridden to customize the label of the header cell.
      * @return string label
+     * @since 2.0.8
      */
     protected function getHeaderCellLabel()
     {
diff --git a/framework/grid/DataColumn.php b/framework/grid/DataColumn.php
index 429edc9..e10234c 100644
--- a/framework/grid/DataColumn.php
+++ b/framework/grid/DataColumn.php
@@ -132,6 +132,7 @@ class DataColumn extends Column
 
     /**
      * @inheritdoc
+     * @since 2.0.8
      */
     protected function getHeaderCellLabel()
     {