diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 1e0c04cd23fbaa726a10767ed759ed0974682848..d41b7e88d5a3de50b5a5d939d9343742ec76ebde 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -138,8 +138,8 @@ def initialize
# :name, :unique (e.g.
# { name: 'users_name_index', unique: true }) and :order
# (e.g. { order: { name: :desc } }).
- # * remove_index(table_name, column: column_name): Removes the index
- # specified by +column_name+.
+ # * remove_index(table_name, column: column_names): Removes the index
+ # specified by +column_names+.
# * remove_index(table_name, name: index_name): Removes the index
# specified by +index_name+.
# * add_reference(:table_name, :reference_name): Adds a new column