diff --git a/express-validator/express-validator.d.ts b/express-validator/express-validator.d.ts
index 428c90afd..78073231b 100644
--- a/express-validator/express-validator.d.ts
+++ b/express-validator/express-validator.d.ts
@@ -66,12 +66,14 @@ declare module ExpressValidator {
 		 * Accepts http, https, ftp
 		 */
 		isUrl(): Validator;
+
 		/**
 		 * Combines isIPv4 and isIPv6
 		 */
 		isIP(): Validator;
 		isIPv4(): Validator;
 		isIPv6(): Validator;
+		isMACAddress(): Validator;
 		isAlpha(): Validator;
 		isAlphanumeric(): Validator;
 		isNumeric(): Validator;