diff --git a/HISTORY.rst b/HISTORY.rst
index 394c941a..ab3a3500 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -7,7 +7,7 @@ PlatformIO 2.0
 2.9.2 (2016-??-??)
 ~~~~~~~~~~~~~~~~~~
 
-* Use HTTP mirror for Package Manager in case with SSL errors
+* Use HTTP mirror for Package Manager in a case with SSL errors
   (`issue #645 <https://github.com/platformio/platformio/issues/645>`_)
 * Fixed bug with ``env_default`` when ``pio run -e`` is used