diff --git a/Misc/NEWS b/Misc/NEWS
index f13499f..bdfd0b7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -98,6 +98,12 @@
 Library
 -------
 
+- Issue #12776,#11839: call argparse type function (specified by add_argument)
+  only once. Before, the type function was called twice in the case where the
+  default was specified and the argument was given as well.  This was
+  especially problematic for the FileType type, as a default file would always
+  be opened, even if a file argument was specified on the command line.
+
 - Issue #13370: Ensure that ctypes works on Mac OS X when Python is
   compiled using the clang compiler