diff --git a/src/lib/InstantSearch.js b/src/lib/InstantSearch.js
index da460726d6..b4e789b2ba 100644
--- a/src/lib/InstantSearch.js
+++ b/src/lib/InstantSearch.js
@@ -40,7 +40,7 @@ class InstantSearch extends EventEmitter {
     appId = null,
     apiKey = null,
     indexName = null,
-    numberLocale = 'en-EN',
+    numberLocale,
     searchParameters = {},
     urlSync = null
   }) {