add issue number
diff --git a/Misc/NEWS b/Misc/NEWS
index c5d0e47..cf777df 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -234,7 +234,7 @@
 Library
 -------
 
-- Don't accept bytes in FileIO.write().
+- Issue #7785: Don't accept bytes in FileIO.write().
 
 - Removed the functions 'verify' and 'vereq' from Lib/test/support.py.