diff --git a/common/djangoapps/dark_lang/middleware.py b/common/djangoapps/dark_lang/middleware.py
index f6b72426f8..96e06947a6 100644
--- a/common/djangoapps/dark_lang/middleware.py
+++ b/common/djangoapps/dark_lang/middleware.py
@@ -44,11 +44,10 @@ CHINESE_LANGUAGE_CODE_MAP = {
     'zh-hans-cn': 'zh-CN',  # Chinese (Simplified, China)
     'zh-hans-sg': 'zh-CN',  # Chinese (Simplified, Singapore)
     'zh-hant': 'zh-TW',     # Chinese (Traditional)
-    'zh-hant-hk': 'zh-TW',  # Chinese (Traditional, Hongkong)
+    'zh-hant-hk': 'zh-HK',  # Chinese (Traditional, Hongkong)
     'zh-hant-mo': 'zh-TW',  # Chinese (Traditional, Macau)
     'zh-hant-tw': 'zh-TW',  # Chinese (Traditional, Taiwan)
     # The following are the old-style language codes that django does not recognize
-    'zh-hk': 'zh-TW',       # Chinese (Traditional, Hongkong)
     'zh-mo': 'zh-TW',       # Chinese (Traditional, Macau)
     'zh-sg': 'zh-CN',       # Chinese (Simplified, Singapore)
 }
diff --git a/common/djangoapps/dark_lang/tests.py b/common/djangoapps/dark_lang/tests.py
index 16032325d8..c1174adc8b 100644
--- a/common/djangoapps/dark_lang/tests.py
+++ b/common/djangoapps/dark_lang/tests.py
@@ -217,12 +217,12 @@ class DarkLangMiddlewareTests(TestCase):
 
     def test_accept_chinese_language_codes(self):
         DarkLangConfig(
-            released_languages=('zh-cn, zh-tw'),
+            released_languages=('zh-cn, zh-hk, zh-tw'),
             changed_by=self.user,
             enabled=True
         ).save()
 
         self.assertAcceptEquals(
-            'zh-CN;q=1.0, zh-TW;q=0.5, zh-TW;q=0.3',
-            self.process_request(accept='zh-Hans;q=1.0, zh-Hant-TW;q=0.5, zh-hk;q=0.3')
+            'zh-CN;q=1.0, zh-TW;q=0.5, zh-HK;q=0.3',
+            self.process_request(accept='zh-Hans;q=1.0, zh-Hant-TW;q=0.5, zh-HK;q=0.3')
         )