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diff --git a/CHANGELOG b/CHANGELOG
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--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix possible header duplicates when using additional headers (#1489033)
 - Fix session issues with use_https=true (#1488986)
 - Fix blockquote width in sent mail (#1489031)
 - Fix keyboard events on list widgets in Internet Explorer (#1489025)