diff --git a/xdocs/changes.xml b/xdocs/changes.xml
index cfb9612b6b..f8252ce730 100644
--- a/xdocs/changes.xml
+++ b/xdocs/changes.xml
@@ -375,7 +375,11 @@ Apologies if we have omitted anyone else.
Known problems and workarounds
-
+
The Once Only controller behaves correctly under a Thread Group or Loop Controller,
but otherwise its behaviour is not consistent (or clearly specified).