diff --git a/http/lib/src/http_constant.dart b/http/lib/src/http_constant.dart
index 1cdf8d0..df54ecf 100644
--- a/http/lib/src/http_constant.dart
+++ b/http/lib/src/http_constant.dart
@@ -60,6 +60,9 @@ const String httpContentTypeJson = 'application/json';
 /// Http content type utf8.
 const String httpContentTypeCharsetUtf8 = 'charset=utf-8';
 
+/// URL encoded
+const httpContentTypeWwwFormUrlEncoded = 'application/x-www-form-urlencoded';
+
 /// Http content type html.
 const String httpContentTypeHtml = 'text/html';