diff --git a/src/BundleAnalyzerPlugin.js b/src/BundleAnalyzerPlugin.js
index 888296a2..0fa1779d 100644
--- a/src/BundleAnalyzerPlugin.js
+++ b/src/BundleAnalyzerPlugin.js
@@ -130,7 +130,7 @@ class BundleAnalyzerPlugin {
   getBundleDirFromCompiler() {
     switch (this.compiler.outputFileSystem.constructor.name) {
       case 'MemoryFileSystem':
-        
+        return null;
       // Detect AsyncMFS used by Nuxt 2.5 that replaces webpack's MFS during development
       // Related: #274
       case 'AsyncMFS':