diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb
index 595ef4ee25..1b2c9c6754 100644
--- a/activerecord/lib/active_record/core.rb
+++ b/activerecord/lib/active_record/core.rb
@@ -45,7 +45,7 @@ module ActiveRecord
       #     #<ActiveRecord::DatabaseConfigurations::HashConfig:0x00007fd1acbded10 @env_name="development",
       #       @spec_name="primary", @config={"adapter"=>"sqlite3", "database"=>"db/development.sqlite3"}>,
       #     #<ActiveRecord::DatabaseConfigurations::HashConfig:0x00007fd1acbdea90 @env_name="production",
-      #       @spec_name="primary", @config={"adapter"=>"mysql2", "database"=>"db/production.sqlite3"}>
+      #       @spec_name="primary", @config={"adapter"=>"sqlite3", "database"=>"db/production.sqlite3"}>
       #   ]>
       def self.configurations=(config)
         @@configurations = ActiveRecord::DatabaseConfigurations.new(config)