Issue #17998: Fix an internal error in regular expression engine.
diff --git a/Misc/NEWS b/Misc/NEWS
index e3394c4..ef614c7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -26,6 +26,8 @@
 Library
 -------
 
+- Issue #17998: Fix an internal error in regular expression engine.
+
 - Issue #17557: Fix os.getgroups() to work with the modified behavior of
   getgroups(2) on OS X 10.8.  Original patch by Mateusz Lenik.