diff --git a/types/config.d.ts b/types/config.d.ts
index 344ddc28ee16..5547cd201eb6 100644
--- a/types/config.d.ts
+++ b/types/config.d.ts
@@ -49,7 +49,7 @@ type SafelistConfig =
   | string[]
   | {
       pattern: RegExp
-      variants: string[]
+      variants?: string[]
     }[]
 
 // Presets related config