diff --git a/lib/types/string.js b/lib/types/string.js
index 387c992b..12ad12ec 100755
--- a/lib/types/string.js
+++ b/lib/types/string.js
@@ -27,7 +27,7 @@ const internals = {
         }
     },
     dataUriRegex: /^data:[\w+.-]+\/[\w+.-]+;((charset=[\w-]+|base64),)?(.*)$/,
-    hexRegex: /^[a-f0-9]+$/i,
+    hexRegex: /^(0x)?[0-9a-f]+$/i,
     ipRegex: Ip.regex({ cidr: 'forbidden' }).regex,
     isoDurationRegex: /^P(?!$)(\d+Y)?(\d+M)?(\d+W)?(\d+D)?(T(?=\d)(\d+H)?(\d+M)?(\d+S)?)?$/,