diff --git a/Misc/NEWS b/Misc/NEWS
index a783add..bb02909 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@
 Core and builtins
 -----------------
 
+- Patch #703779: unset __file__ in __main__ after running a file. This
+  makes the filenames the warning module prints much more sensible when
+  a PYTHONSTARTUP file is used.
+
 - Variant of patch #697613: don't exit the interpreter on a SystemExit
   exception if the -i command line option or PYTHONINSPECT environment
   variable is given, but break into the interactive interpreter just like