diff --git a/packages/core/parcel-bundler/src/transforms/postcss.js b/packages/core/parcel-bundler/src/transforms/postcss.js
index 4718d1477ed..d07f558d39d 100644
--- a/packages/core/parcel-bundler/src/transforms/postcss.js
+++ b/packages/core/parcel-bundler/src/transforms/postcss.js
@@ -52,8 +52,8 @@ async function getConfig(asset) {
 
   if (config.plugins && config.plugins['postcss-modules']) {
     postcssModulesConfig = Object.assign(
-      config.plugins['postcss-modules'],
-      postcssModulesConfig
+      postcssModulesConfig,
+      config.plugins['postcss-modules']
     );
     delete config.plugins['postcss-modules'];
   }