diff --git a/types/joi/index.d.ts b/types/joi/index.d.ts
index 8f5e7b7a2a..ed94ed44b7 100644
--- a/types/joi/index.d.ts
+++ b/types/joi/index.d.ts
@@ -792,6 +792,11 @@ export interface ObjectSchema extends AnySchema {
      */
     length(limit: number): this;
 
+    /**
+     * Requires the object to be a Joi schema instance.
+     */
+    schema(): this;
+
     /**
      * Specify validation rules for unknown keys matching a pattern.
      *
diff --git a/types/joi/joi-tests.ts b/types/joi/joi-tests.ts
index af85cab0ac..4dbc784756 100644
--- a/types/joi/joi-tests.ts
+++ b/types/joi/joi-tests.ts
@@ -706,6 +706,8 @@ objSchema = objSchema.nand(str, str);
 objSchema = objSchema.nand(str, str, str);
 objSchema = objSchema.nand(strArr);
 
+objSchema = objSchema.schema();
+
 objSchema = objSchema.or(str);
 objSchema = objSchema.or(str, str);
 objSchema = objSchema.or(str, str, str);