diff --git a/src/wp-admin/includes/class-wp-list-table-compat.php b/src/wp-admin/includes/class-wp-list-table-compat.php
index eb9ea2cfe3..9bf71b76ef 100644
--- a/src/wp-admin/includes/class-wp-list-table-compat.php
+++ b/src/wp-admin/includes/class-wp-list-table-compat.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * Helper functions for displaying a list of items in an ajaxified HTML table.
+ * Helper functions for displaying an array of items in an ajaxified HTML table.
  *
  * @package WordPress
  * @subpackage List_Table
@@ -8,7 +8,7 @@
  */
 
 /**
- * Helper class to be used only by back compat functions
+ * Helper class to be used only by back compat functions.
  *
  * @since 3.1.0
  */
@@ -16,6 +16,14 @@ class _WP_List_Table_Compat extends WP_List_Table {
 	public $_screen;
 	public $_columns;
 
+	/**
+	 * Constructor function.
+	 *
+	 * @param string|WP_Screen $screen  The current screen.
+	 * @param array            $columns The columns in the current screen.
+	 *
+	 * @since 3.1.0
+	 */
 	public function __construct( $screen, $columns = array() ) {
 		if ( is_string( $screen ) ) {
 			$screen = convert_to_screen( $screen );
@@ -30,7 +38,11 @@ class _WP_List_Table_Compat extends WP_List_Table {
 	}
 
 	/**
-	 * @return array
+	 * Gets an array of columns: all, hidden, sortable and default primary columns.
+	 *
+	 * @since 3.1.0
+	 *
+	 * @return array The column info.
 	 */
 	protected function get_column_info() {
 		$columns  = get_column_headers( $this->_screen );
@@ -42,7 +54,11 @@ class _WP_List_Table_Compat extends WP_List_Table {
 	}
 
 	/**
-	 * @return array
+	 * Gets an array of columns.
+	 *
+	 * @since 3.1.0
+	 *
+	 * @return array The columns.
 	 */
 	public function get_columns() {
 		return $this->_columns;