diff --git a/Misc/NEWS b/Misc/NEWS
index d8e6b3c1010..eab647e6155 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -19,6 +19,9 @@ Core and builtins
 
 - Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
 
+- The return tuple from str.rpartition(sep) is (tail, sep, head) where
+  head is the original string if sep was not found.
+
 
 Library
 -------