diff --git a/test/types/schema.test.ts b/test/types/schema.test.ts
index 2be451d4b34..b4035ceb651 100644
--- a/test/types/schema.test.ts
+++ b/test/types/schema.test.ts
@@ -1733,3 +1733,8 @@ async function gh15236() {
 
   schema.path<Schema.Types.Number>('myNum').min(0);
 }
+
+function gh15244() {
+  const schema = new Schema({});
+  schema.discriminator('Name', new Schema({}), { value: 'value' });
+}
diff --git a/types/index.d.ts b/types/index.d.ts
index 9cf63bc396f..a5dbf29c818 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -297,7 +297,7 @@ declare module 'mongoose' {
     /** Returns a copy of this schema */
     clone<T = this>(): T;
 
-    discriminator<DisSchema = Schema>(name: string | number, schema: DisSchema): this;
+    discriminator<DisSchema = Schema>(name: string | number, schema: DisSchema, options?: DiscriminatorOptions): this;
 
     /** Returns a new schema that has the picked `paths` from this schema. */
     pick<T = this>(paths: string[], options?: SchemaOptions): T;