diff --git a/NEWS b/NEWS
index 7ae255f..a334593 100644
--- a/NEWS
+++ b/NEWS
@@ -63,6 +63,10 @@ with all sufficient information, see the ChangeLog file.
     * Most symbols which are returned by String#to_sym and
       String#intern are GC-able.

+* Math
+  * New method:
+    * Math.normcdf(x) returns cumulative distribution function (CDF) of the standard normal distribution for +x+.
+
 * Matrix
   * New methods:
     * Matrix#first_minor(row, column) returns the submatrix obtained