diff --git a/zkdoc/release-note b/zkdoc/release-note
index 69ab7bd41db..bb2d84cfa3e 100644
--- a/zkdoc/release-note
+++ b/zkdoc/release-note
@@ -60,6 +60,7 @@ ZK 10.0.0
   ZK-5235: Opening a menupopup moves a scrollbar of a long menu back to top
   ZK-5539: $init() will call twice on Keikai component
   ZK-5540: zk.wpd with browser condition won't work with ZK 10
+  ZK-5530: users cannot focus on the icons on the Calendar header
 
 * Upgrade Notes
   + The Java binary-compatible level is Java 11 since ZK 10.