diff --git a/installer/data/mysql/atomicupdate/bug_16401.perl b/installer/data/mysql/atomicupdate/bug_16401.perl
index 3f3492e1ee..75d899d066 100644
--- a/installer/data/mysql/atomicupdate/bug_16401.perl
+++ b/installer/data/mysql/atomicupdate/bug_16401.perl
@@ -2,6 +2,13 @@ $DBversion = 'XXX';  # will be replaced by the RM
 if( CheckVersion( $DBversion ) ) {
     $dbh->do( "UPDATE systempreferences SET value = CONCAT('http://', value) WHERE variable = 'staffClientBaseURL' AND value <> '' AND value NOT LIKE 'http%'" );
 
+    my ( $staffClientBaseURL_used_in_notices ) = $dbh->selectrow_array(q|
+        SELECT COUNT(*) FROM letter where content like "%staffClientBaseURL%"
+    |);
+    if ( $staffClientBaseURL_used_in_notices ) {
+        warn "\tYou may need to update one or more notice templates if they contain 'staffClientBaseURL'\n";
+    }
+
     # Always end with this (adjust the bug info)
     SetVersion( $DBversion );
     print "Upgrade to $DBversion done (Bug 16401 - fix potentialy bad set staffClientBaseURL preference)\n";