diff --git a/lib/core_extensions.rb b/lib/core_extensions.rb
index <HASH>..<HASH> 100644
--- a/lib/core_extensions.rb
+++ b/lib/core_extensions.rb
@@ -1,3 +1,5 @@
+# For a bit of backward compatibility.
+# Thanks to @jhsu for discovering the discrepancy.
 if MiniTest.const_defined?(:Unit)
   class MiniTest::Unit::TestCase
     def name
Give credit to @jhsu for pull request #1.