diff --git a/types/express-formidable/index.d.ts b/types/express-formidable/index.d.ts
index 75a34d0350..ee38be639e 100644
--- a/types/express-formidable/index.d.ts
+++ b/types/express-formidable/index.d.ts
@@ -22,6 +22,7 @@ interface ExpressFormidableOptions {
     uploadDir?: string;
     keepExtensions?: boolean;
     type?: "multipart" | "urlencoded";
+    maxFileSize?: number;
     maxFieldsSize?: number;
     maxFields?: number;
     hash?: boolean | "sha1" | "md5";
diff --git a/types/formidable/index.d.ts b/types/formidable/index.d.ts
index 8163fa5894..da5c730ae8 100644
--- a/types/formidable/index.d.ts
+++ b/types/formidable/index.d.ts
@@ -14,6 +14,7 @@ export declare class IncomingForm extends events.EventEmitter {
     encoding: string;
     uploadDir: string;
     keepExtensions: boolean;
+    maxFileSize: number;
     maxFieldsSize: number;
     maxFields: number;
     hash: string | boolean;