diff --git a/chrome/common/extensions/api/api_sources.gni b/chrome/common/extensions/api/api_sources.gni
index 11358cf8b2d77..e147bedfa8744 100644
--- a/chrome/common/extensions/api/api_sources.gni
+++ b/chrome/common/extensions/api/api_sources.gni
@@ -70,6 +70,7 @@ if (enable_extensions) {
     "autotest_private.idl",
     "bookmark_manager_private.json",
     "braille_display_private.idl",
+    "browser_os.idl",
     "chrome_web_view_internal.json",
     "command_line_private.json",
     "content_settings.json",
