diff --git a/module.cpp b/module.cpp
index 94682dc0..5629010f 100644
--- a/module.cpp
+++ b/module.cpp
@@ -1979,6 +1979,9 @@ void
 Module::execPreprocessor(const char *infilename, llvm::raw_string_ostream *ostream) const
 {
     clang::CompilerInstance inst;
+#if defined(LLVM_3_5)
+    inst.createVirtualFileSystem();
+#endif
     inst.createFileManager();
 
     llvm::raw_fd_ostream stderrRaw(2, false);