diff --git a/lib/json/add/ostruct.rb b/lib/json/add/ostruct.rb
index e064c85f..686cf002 100644
--- a/lib/json/add/ostruct.rb
+++ b/lib/json/add/ostruct.rb
@@ -23,7 +23,7 @@ def as_json(*)
     }
   end
 
-  # Stores class name (OpenStruct) with this struct's values <tt>v</tt> as a
+  # Stores class name (OpenStruct) with this struct's values <tt>t</tt> as a
   # JSON string.
   def to_json(*args)
     as_json.to_json(*args)