diff --git a/mongoose/index.d.ts b/mongoose/index.d.ts
index e7446fccc3..a0508e7223 100644
--- a/mongoose/index.d.ts
+++ b/mongoose/index.d.ts
@@ -717,7 +717,7 @@ declare module "mongoose" {
     /** defaults to true */
     validateBeforeSave?: boolean;
     /** defaults to "__v" */
-    versionKey?: string;
+    versionKey?: string|boolean;
     /**
      * skipVersioning allows excluding paths from
      * versioning (the internal revision will not be