diff --git a/ShadowsocksX-NG/PreferencesWindowController.swift b/ShadowsocksX-NG/PreferencesWindowController.swift
index 8a725ea..2019dd9 100644
--- a/ShadowsocksX-NG/PreferencesWindowController.swift
+++ b/ShadowsocksX-NG/PreferencesWindowController.swift
@@ -57,6 +57,9 @@ class PreferencesWindowController: NSWindowController
             "aes-128-cfb",
             "aes-192-cfb",
             "aes-256-cfb",
+            "aes-128-ctr",
+            "aes-192-ctr",
+            "aes-256-ctr",
             "bf-cfb",
             "camellia-128-cfb",
             "camellia-192-cfb",