diff --git a/types/document.d.ts b/types/document.d.ts
index 44c74022141..703d54b885d 100644
--- a/types/document.d.ts
+++ b/types/document.d.ts
@@ -26,7 +26,7 @@ declare module 'mongoose' {
     __v?: any;
 
     /** Assert that a given path or paths is populated. Throws an error if not populated. */
-    $assertPopulated<Paths = {}>(paths: string | string[]): Omit<this, keyof Paths> & Paths;
+    $assertPopulated<Paths = {}>(paths: string | string[]): Omit<DocType, keyof Paths> & Paths;
 
     /* Get all subdocs (by bfs) */
     $getAllSubdocs(): Document[];