diff --git a/CHANGELOG b/CHANGELOG
index 0be8194c4..69005c26b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -4,6 +4,7 @@ CHANGELOG RoundCube Webmail
 2007/05/13 (thomasb)
 ----------
 - Updated Norwegian (bokmal), Czech, Danish and Portuguese (standard) translation
+- Fixed marking as read in preview pane (closes #1484364)
 
 
 2007/05/03 (yllar)
diff --git a/program/js/app.js b/program/js/app.js
index 5edef2c9f..125e44f9d 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -170,7 +170,7 @@ function rcube_webmail()
           {
           this.enable_command('compose', 'add-contact', false);
           parent.rcmail.show_contentframe(true);
-          parent.rcmail.mark_message('read', this.uid);
+          parent.rcmail.mark_message('read', this.env.uid);
           }
 
         if ((this.env.action=='show' || this.env.action=='preview') && this.env.blockedobjects)