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diff --git a/Misc/NEWS b/Misc/NEWS
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--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -2,6 +2,20 @@
 Python News
 +++++++++++
 
+What's New in Python 3.4.2?
+===========================
+
+Release date: XXXX-XX-XX
+
+Core and Builtins
+-----------------
+
+- Issue #21523: Fix over-pessimistic computation of the stack effect of
+  some opcodes in the compiler.  This also fixes a quadratic compilation
+  time issue noticeable when compiling code with a large number of "and"
+  and "or" operators.
+
+
 What's New in Python 3.4.1?
 ===========================