diff --git a/ChangeLog b/ChangeLog
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@@ -1,3 +1,6 @@
+2023-02-05 Andrew Ruthven <Andrew Ruthven>
+	* Fix is-defined and is-not-defined prop-filters
+
 2022-02-07 Andrew Ruthven <andrew@etc.gen.nz>
 	* Fix Reccurrence Rules using BYHOUR, BYMINUTE and BYSECOND.