diff --git a/src/Faker/Provider/Internet.php b/src/Faker/Provider/Internet.php
index dfd9e56000..d4b0e23db2 100644
--- a/src/Faker/Provider/Internet.php
+++ b/src/Faker/Provider/Internet.php
@@ -209,6 +209,10 @@ public static function macAddress()
 
     protected static function transliterate($string)
     {
+        if (0 === preg_match('/[^A-Za-z0-9_.]/', $string)) {
+            return $string;
+        }
+
         $transId = 'Any-Latin; Latin-ASCII; NFD; [:Nonspacing Mark:] Remove; NFC;';
         if (function_exists('transliterator_transliterate') && $transliterator = \Transliterator::create($transId)) {
             $transString = $transliterator->transliterate($string);