diff --git a/clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp b/clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
--- a/clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
+++ b/clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
@@ -191,7 +191,6 @@
     ScanInstance.getFrontendOpts().UseGlobalModuleIndex = false;
     ScanInstance.getFrontendOpts().ModulesShareFileManager = false;
 
-    FileMgr->getFileSystemOpts().WorkingDir = std::string(WorkingDirectory);
     ScanInstance.setFileManager(FileMgr);
     ScanInstance.createSourceManager(*FileMgr);
 
@@ -395,8 +394,9 @@
   // Reset what might have been modified in the previous worker invocation.
   RealFS->setCurrentWorkingDirectory(WorkingDirectory);
 
-  auto FileMgr =
-      llvm::makeIntrusiveRefCnt<FileManager>(FileSystemOptions(), RealFS);
+  FileSystemOptions FSOpts;
+  FSOpts.WorkingDir = WorkingDirectory.str();
+  auto FileMgr = llvm::makeIntrusiveRefCnt<FileManager>(FSOpts, RealFS);
 
   Optional<std::vector<std::string>> ModifiedCommandLine;
   if (ModuleName) {