diff --git a/RELEASENOTES-DEVELOPMENT.md b/RELEASENOTES-DEVELOPMENT.md
index 2049a7c8..47d70638 100644
--- a/RELEASENOTES-DEVELOPMENT.md
+++ b/RELEASENOTES-DEVELOPMENT.md
@@ -1,3 +1,8 @@
+Version 
+==
+**Bug Fix**
+* When an immediate flush is requested, reset the PTP clock anchor information _immediately_ to disable clocking until play is resumed. This prevents occasional apparent sudden jumps in the timing of frames of audio due to using an obsolete clock. It was causing no known problems.
+
 Version 5.1-dev-17-g9b16ff92
 ==
 **Bug Fixes**