diff --git a/src/vs/workbench/browser/workbench.contribution.ts b/src/vs/workbench/browser/workbench.contribution.ts
index 6eb31701e2b..f96c3d57c89 100644
--- a/src/vs/workbench/browser/workbench.contribution.ts
+++ b/src/vs/workbench/browser/workbench.contribution.ts
@@ -102,6 +102,7 @@ const registry = Registry.as<IConfigurationRegistry>(ConfigurationExtensions.Con
 			'workbench.editor.historyBasedLanguageDetection': {
 				type: 'boolean',
 				default: false,
+				tags: ['experimental'],
 				description: localize('workbench.editor.historyBasedLanguageDetection', "Enables use of editor history in language detection. This causes automatic language detection to favor languages that have been recently opened and allows for automatic language detection to operate with smaller inputs."),
 			},
 			'workbench.editor.tabCloseButton': {