diff --git a/install/dist/lib/debian60.lib.php b/install/dist/lib/debian60.lib.php
index dad45690ebc23040044e4143c549de5784b20eb4..9d6b2d6e4224d295b0da09db62472712966784d9 100644
--- a/install/dist/lib/debian60.lib.php
+++ b/install/dist/lib/debian60.lib.php
@@ -134,6 +134,10 @@ class installer extends installer_base {
 		$content = str_replace('{mysql_server_host}', $conf['mysql']['host'], $content);
 		$content = str_replace('{mysql_server_port}', $conf['mysql']['port'], $content);
 		$content = str_replace('{server_id}', $conf['server_id'], $content);
+		# enable iterate_query for dovecot2
+		if(version_compare($dovecot_version,2, '>=')) {
+			$content = str_replace('# iterate_query', 'iterate_query', $content);
+		}
 		wf($config_dir.'/'.$configfile, $content);
 
 		chmod($config_dir.'/'.$configfile, 0600);