diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0ce37ae..735dd75e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -78,6 +78,7 @@ v1.6.0 - unreleased
 - Enhancement: Update documentation
 - Enhancement: Include favicon package ([#801](https://github.com/Mailu/Mailu/issues/801), ([#802](https://github.com/Mailu/Mailu/issues/802))
 - Enhancement: Add logging at critical places in python start.py scripts. Implement LOG_LEVEL to control verbosity ([#588](https://github.com/Mailu/Mailu/issues/588))
+- Enhancement: Mark message as seen when reporting as spam
 - Upstream: Update Roundcube
 - Upstream: Update Rainloop
 - Bug: Rainloop fails with "domain not allowed" ([#93](https://github.com/Mailu/Mailu/issues/93))
diff --git a/core/dovecot/conf/report-spam.sieve b/core/dovecot/conf/report-spam.sieve
index 108d6210..87fd515e 100644
--- a/core/dovecot/conf/report-spam.sieve
+++ b/core/dovecot/conf/report-spam.sieve
@@ -1,3 +1,5 @@
+require "imap4flags";
 require "vnd.dovecot.execute";
 
+setflag "\\seen";
 execute :pipe "spam";