diff --git a/addons/web/controllers/webclient.py b/addons/web/controllers/webclient.py
index 6a88cc9a122..e6d8783393f 100644
--- a/addons/web/controllers/webclient.py
+++ b/addons/web/controllers/webclient.py
@@ -29,10 +29,17 @@ def CONTENT_MAXAGE():
     return http.STATIC_CACHE_LONG
 
 
+MOMENTJS_LANG_CODES_MAP = {
+    "sr_RS": "sr_cyrl",
+    "sr@latin": "sr"
+}
+
+
 class WebClient(http.Controller):
 
     @http.route('/web/webclient/locale/<string:lang>', type='http', auth="none")
     def load_locale(self, lang):
+        lang = MOMENTJS_LANG_CODES_MAP.get(lang, lang)
         magic_file_finding = [lang.replace("_", '-').lower(), lang.split('_')[0]]
         for code in magic_file_finding:
             try: