diff --git a/lib/style-compiler/load-postcss-config.js b/lib/style-compiler/load-postcss-config.js
index 43ee6e8dc..95bac6a1c 100644
--- a/lib/style-compiler/load-postcss-config.js
+++ b/lib/style-compiler/load-postcss-config.js
@@ -1,6 +1,6 @@
 var load = require('postcss-load-config')
 
-var loaded
+let loaded
 
 function isObject (val) {
   return val && typeof val === 'object'