diff --git a/NEWS b/NEWS
index b215e2e6c1..8456189a28 100644
--- a/NEWS
+++ b/NEWS
@@ -159,8 +159,16 @@ with all sufficient information, see the ChangeLog file or Redmine
   * String#concat, String#prepend [Feature #12333]
     Now takes multiple arguments.
 
+  * String#each_line, String#lines now takes an optional keyword argument,
+    chomp flag.  [Feature #12553]
+
   * String#unpack1 [Feature #12752]
 
+* StringIO
+
+  * StringIO#gets, StringIO#readline, StringIO#each_line, StringIO#readlines now takes
+    an optional keyword argument, chomp flag.  [Feature #12553]
+
 * Symbol
 
   * Symbol#casecmp? [Feature #12786]