diff --git a/types/pipelinestage.d.ts b/types/pipelinestage.d.ts
index f58e4b61f27..37d228ff1b7 100644
--- a/types/pipelinestage.d.ts
+++ b/types/pipelinestage.d.ts
@@ -213,7 +213,7 @@ declare module 'mongoose' {
 
     export interface ReplaceWith {
       /** [`$replaceWith` reference](https://docs.mongodb.com/manual/reference/operator/aggregation/replaceWith/) */
-      $replaceWith: ObjectExpressionOperator | { [field: string]: Expression };
+      $replaceWith: ObjectExpressionOperator | { [field: string]: Expression } | `$${string}`;
     }
 
     export interface Sample {