diff --git a/CHANGELOG b/CHANGELOG
index 062d77592..3a9bbbf91 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -4,6 +4,7 @@
 - action when clicking on a thumbnail can be set (download or view online)
 - major update of polish translation
 - fix getting access rights in getMandatoryApprovers() and getMandatoryReviewers()
+- better checking for attribute definition when build a search query
 
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                      Changes in version 5.1.40