diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index 17ac35383c..8c73ef8e25 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -1490,7 +1490,7 @@ declare module "mongoose" {
 
       /**
        * Return the index of obj or -1 if not found.
-       * @param obj he item to look for
+       * @param obj the item to look for
        */
       indexOf(obj: any): number;