diff --git a/typo3/sysext/backend/Classes/Toolbar/ToolbarItemInterface.php b/typo3/sysext/backend/Classes/Toolbar/ToolbarItemInterface.php
index 4d564ae017f9719f00731fa2ba1a88043458020a..dbb94801ab31126ce86f2529c27c90a4d97ff408 100644
--- a/typo3/sysext/backend/Classes/Toolbar/ToolbarItemInterface.php
+++ b/typo3/sysext/backend/Classes/Toolbar/ToolbarItemInterface.php
@@ -62,7 +62,7 @@ interface ToolbarItemInterface {
 	 *     'data-foo' => '42',
 	 * )
 	 *
-	 * @return string List item HTML attributes
+	 * @return array List item HTML attributes
 	 */
 	public function getAdditionalAttributes();