diff --git a/CHANGES b/CHANGES
index e29593fcc..ef561b8b2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6,7 +6,7 @@ Incompatible changes
 
 * Drop ``PorterStemmer`` package support. Use ``PyStemmer`` instead of ``PorterStemmer``
   to accelerate stemming.
-* Now sphinx_rtd_theme become optional. Please install it manually.
+* sphinx_rtd_theme has become optional. Please install it manually.
   Refs #2087, #2086, #1845 and #2097. Thanks to Victor Zverovich.
 * #2231: Use DUrole instead of DUspan for custom roles in LaTeX writer. It enables to take
   title of roles as an argument of custom macros.