diff --git a/resources/lang/en/validation.php b/resources/lang/en/validation.php
index f4961e00..87fb437c 100644
--- a/resources/lang/en/validation.php
+++ b/resources/lang/en/validation.php
@@ -68,6 +68,7 @@ return [
     'ip' => 'The :attribute must be a valid IP address.',
     'ipv4' => 'The :attribute must be a valid IPv4 address.',
     'ipv6' => 'The :attribute must be a valid IPv6 address.',
+    'mac_address' => 'The :attribute must be a valid MAC address.',
     'json' => 'The :attribute must be a valid JSON string.',
     'lt' => [
         'numeric' => 'The :attribute must be less than :value.',