diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index fea522351cd1b..eea668db91b63 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -188,6 +188,9 @@ extern const char kByDateHistoryInSidePanelDescription[];
 extern const char kBookmarksTreeViewName[];
 extern const char kBookmarksTreeViewDescription[];
 
+extern const char kBrowserOsAlphaFeaturesName[];
+extern const char kBrowserOsAlphaFeaturesDescription[];
+
 extern const char kBrowsingHistoryActorIntegrationM1Name[];
 extern const char kBrowsingHistoryActorIntegrationM1Description[];
 #endif
