diff --git a/HISTORY.rst b/HISTORY.rst
index 2dd9c2274c..395e28be66 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -67,7 +67,9 @@ PlatformIO 3.0
   (`issue #721 <https://github.com/platformio/platformio/issues/721>`_)
 * Added ``license`` field to `library.json <http://docs.platformio.org/en/latest/librarymanager/config.html>`__
   (`issue #522 <https://github.com/platformio/platformio/issues/522>`_)
-* Stopped Supporting Python 2.6
+* Warn about unknown options in project configuration file ``platformio.ini``
+  (`issue #740 <https://github.com/platformio/platformio/issues/740>`_)
+* Stopped supporting Python 2.6
 
 
 PlatformIO 2.0