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