diff --git a/data/Dockerfiles/dovecot/imapsync_cron.pl b/data/Dockerfiles/dovecot/imapsync_cron.pl
index 1976f8ec..1ce46c4c 100755
--- a/data/Dockerfiles/dovecot/imapsync_cron.pl
+++ b/data/Dockerfiles/dovecot/imapsync_cron.pl
@@ -31,7 +31,7 @@ $DBUSER = '';
 $DBPASS = '';
 
 $run_dir="/tmp";
-$dsn = "DBI:mysql:database=" . $DBNAME . ";host=mysql";
+$dsn = "DBI:mysql:database=" . $DBNAME . ";mysql_socket=/var/run/mysqld/mysqld.sock";
 $lock_file = $run_dir . "/imapsync_busy";
 $lockmgr = LockFile::Simple->make(-autoclean => 1, -max => 1);
 $lockmgr->lock($lock_file) || die "can't lock ${lock_file}";