diff --git a/sphinx/search/__init__.py b/sphinx/search/__init__.py
index 6e9610a49..a3ff4bb4e 100644
--- a/sphinx/search/__init__.py
+++ b/sphinx/search/__init__.py
@@ -283,5 +283,5 @@ class IndexBuilder(object):
     def context_for_searchtool(self):
         return dict(
             search_language_stemming_code = self.lang.js_stemmer_code,
-            search_language_stop_words = jsdump.dumps(self.lang.stopwords),
+            search_language_stop_words = jsdump.dumps(sorted(self.lang.stopwords)),
         )