diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index bf246f4..470429c 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -97,6 +97,10 @@
 void CompilerInstance::setTarget(TargetInfo *Value) { Target = Value; }
 void CompilerInstance::setAuxTarget(TargetInfo *Value) { AuxTarget = Value; }
 
+llvm::vfs::FileSystem &CompilerInstance::getVirtualFileSystem() const {
+  return getFileManager().getVirtualFileSystem();
+}
+
 void CompilerInstance::setFileManager(FileManager *Value) {
   FileMgr = Value;
 }