diff --git a/lib/webpack5/file-watcher-api.js b/lib/webpack5/file-watcher-api.js
index 1a7c0b9e..0803fdee 100644
--- a/lib/webpack5/file-watcher-api.js
+++ b/lib/webpack5/file-watcher-api.js
@@ -58,7 +58,6 @@ function isSnapShotValid (snapshot, mainCompilation) {
 function watchFiles (mainCompilation, fileDependencies) {
   Object.keys(fileDependencies).forEach((depencyTypes) => {
     fileDependencies[depencyTypes].forEach(fileDependency => {
-      mainCompilation.fileDependencies.add(fileDependency);
       mainCompilation[depencyTypes].add(fileDependency);
     });
   });