Clarify bug #1377858 entry.
diff --git a/Misc/NEWS b/Misc/NEWS
index fccc50d..8cff951 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,7 +13,8 @@
 -----------------
 
 - Bug #1377858: Fix the segfaulting of the interpreter when an object created
-  a weakref on itself during a __del__ call.
+  a weakref on itself during a __del__ call for new-style classes (classic
+  classes still have the bug).
 
 - Bug #1579370: Make PyTraceBack_Here use the current thread, not the
   frame's thread state.