Fix typo.
diff --git a/Misc/NEWS b/Misc/NEWS
index 63281cf..0e3595a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -11,7 +11,7 @@
 -----------------
 
 - Issue #13703: oCERT-2011-003: add -R command-line option and PYTHONHASHSEED
-  environment variables, to provide an opt-in way to protect against denial of
+  environment variable, to provide an opt-in way to protect against denial of
   service attacks due to hash collisions within the dict and set types.  Patch
   by David Malcolm, based on work by Victor Stinner.