diff --git a/packages/webpack/lib/plugins/log.js b/packages/webpack/lib/plugins/log.js
index ba24325c70..0a0579bcd3 100644
--- a/packages/webpack/lib/plugins/log.js
+++ b/packages/webpack/lib/plugins/log.js
@@ -46,9 +46,11 @@ const formatWarning = (name, duration, assets, isRebuild) => {
 };
 
 const formatSuccess = (name, duration, assets, isRebuild) => {
-  const totalSize = Object.values(assets).reduce((sum, asset) => {
-    return sum + (asset.name.endsWith('.map') ? 0 : asset.size);
-  }, 0);
+  const totalSize = Object.values(assets)
+    .filter((asset) => !asset.name.endsWith('.map'))
+    .reduce((sum, asset) => {
+      return sum + asset.size;
+    }, 0);
   const message = `bundling '${name}' finished after ${duration} (${prettyBytes(
     totalSize
   )})`;