diff --git a/types/mongoose/v4/index.d.ts b/types/mongoose/v4/index.d.ts
index c680f3c980..a09aefa8e2 100644
--- a/types/mongoose/v4/index.d.ts
+++ b/types/mongoose/v4/index.d.ts
@@ -754,6 +754,8 @@ declare module "mongoose" {
     methods: any;
     /** Object of currently defined statics on this schema. */
     statics: any;
+    /** Object of currently defined query helpers on this schema. */
+    query: any;
     /** The original object passed to the schema constructor */
     obj: any;
   }