diff --git a/activesupport/lib/active_support/core_ext/string/inflections.rb b/activesupport/lib/active_support/core_ext/string/inflections.rb
index 070bfd7af6dc8..efa2d43f20e9e 100644
--- a/activesupport/lib/active_support/core_ext/string/inflections.rb
+++ b/activesupport/lib/active_support/core_ext/string/inflections.rb
@@ -107,7 +107,7 @@ def underscore
 
   # Replaces underscores with dashes in the string.
   #
-  #   'puni_puni' # => "puni-puni"
+  #   'puni_puni'.dasherize # => "puni-puni"
   def dasherize
     ActiveSupport::Inflector.dasherize(self)
   end