diff --git a/lib/protocol/url/form_data/parser.rb b/lib/protocol/url/form_data/parser.rb
index 105403c..96e7e8f 100644
--- a/lib/protocol/url/form_data/parser.rb
+++ b/lib/protocol/url/form_data/parser.rb
@@ -12,7 +12,7 @@ module URL
 		module FormData
 			# Incrementally parses `application/x-www-form-urlencoded` form data.
 			class Parser
-				CONTENT_TYPE = "application/x-www-form-urlencoded"
+				MEDIA_TYPE = "application/x-www-form-urlencoded"
 				
 				# The encoded body size limit.
 				SIZE_LIMIT = 2 * 1024 * 1024
diff --git a/releases.md b/releases.md
index 19c44c5..05aac8b 100644
--- a/releases.md
+++ b/releases.md
@@ -1,5 +1,9 @@
 # Releases
 
+## Unreleased
+
+  - Rename `Protocol::URL::FormData::Parser::CONTENT_TYPE` to `MEDIA_TYPE`.
+
 ## v0.9.0
 
   - Add `Protocol::URL::LimitError` for configured processing limits.