diff --git a/html-tokenizer.cabal b/html-tokenizer.cabal
--- a/html-tokenizer.cabal
+++ b/html-tokenizer.cabal
@@ -1,7 +1,7 @@
 name:
   html-tokenizer
 version:
-  0.2.1.1
+  0.2.1.2
 synopsis:
   An "attoparsec"-based HTML tokenizer
 description:
diff --git a/library/HTMLTokenizer/Parser.hs b/library/HTMLTokenizer/Parser.hs
--- a/library/HTMLTokenizer/Parser.hs
+++ b/library/HTMLTokenizer/Parser.hs
@@ -29,8 +29,8 @@
   -- An opening tag.
   Token_OpeningTag OpeningTag |
   -- |
-  -- A closing tag name.
-  Token_ClosingTag (CI Text) |
+  -- A closing tag.
+  Token_ClosingTag ClosingTag |
   -- |
   -- A text between tags with HTML-entities decoded.
   Token_Text Text |