diff --git a/lib/builder/webpack/base.js b/lib/builder/webpack/base.js
index 0f22b8dae3..429147a947 100644
--- a/lib/builder/webpack/base.js
+++ b/lib/builder/webpack/base.js
@@ -48,9 +48,8 @@ export default class WebpackBaseConfig {
 
     if (typeof fileName === 'function') {
       return name => this.normalizeFileName(fileName(name))
-    } else {
-      return this.normalizeFileName(fileName)
     }
+    return this.normalizeFileName(fileName)
   }
 
   normalizeFileName(fileName) {