diff --git a/lib/Frontend/CacheTokens.cpp b/lib/Frontend/CacheTokens.cpp
index cd5723a..aae572c 100644
--- a/lib/Frontend/CacheTokens.cpp
+++ b/lib/Frontend/CacheTokens.cpp
@@ -23,6 +23,7 @@
 #include "clang/Lex/Preprocessor.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringMap.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Path.h"
@@ -540,9 +541,9 @@
   // Get the name of the main file.
   const SourceManager &SrcMgr = PP.getSourceManager();
   const FileEntry *MainFile = SrcMgr.getFileEntryForID(SrcMgr.getMainFileID());
-  llvm::sys::Path MainFilePath(MainFile->getName());
+  llvm::SmallString<128> MainFilePath(MainFile->getName());
 
-  MainFilePath.makeAbsolute();
+  llvm::sys::fs::make_absolute(MainFilePath);
 
   // Create the PTHWriter.
   PTHWriter PW(*OS, PP);
diff --git a/lib/Frontend/InitPreprocessor.cpp b/lib/Frontend/InitPreprocessor.cpp
index 1f15556..d0111a5 100644
--- a/lib/Frontend/InitPreprocessor.cpp
+++ b/lib/Frontend/InitPreprocessor.cpp
@@ -22,6 +22,7 @@
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/SourceManager.h"
 #include "llvm/ADT/APFloat.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
 using namespace clang;
@@ -55,9 +56,10 @@
   // it has not file entry. For now, workaround this by using an
   // absolute path if we find the file here, and otherwise letting
   // header search handle it.
-  llvm::sys::Path Path(File);
-  Path.makeAbsolute();
-  if (!Path.exists())
+  llvm::SmallString<128> Path(File);
+  llvm::sys::fs::make_absolute(Path);
+  bool exists;
+  if (llvm::sys::fs::exists(Path.str(), exists) || !exists)
     Path = File;
 
   return Lexer::Stringify(Path.str());