diff --git a/services/datasets.js b/services/datasets.js
index 4d1b819d71..c5ddd985bc 100644
--- a/services/datasets.js
+++ b/services/datasets.js
@@ -2,9 +2,9 @@ import { rwRequest, dataRequest } from 'utils/request';
 
 const environmentString = () => {
   const env = process.env.NEXT_PUBLIC_FEATURE_ENV;
-  let envString = 'production';
+  const envString = 'production';
   if (env === 'preproduction') {
-    envString += ',preproduction';
+    return 'preproduction';
   }
   if (env === 'staging') {
     return 'staging';