diff --git a/src/IceTranslator.cpp b/src/IceTranslator.cpp
index 954da47..2a50a41 100644
--- a/src/IceTranslator.cpp
+++ b/src/IceTranslator.cpp
@@ -103,7 +103,7 @@
 
 void Translator::lowerGlobals(
     const VariableDeclarationListType &VariableDeclarations) {
-  llvm::OwningPtr<TargetGlobalInitLowering> GlobalLowering(
+  std::unique_ptr<TargetGlobalInitLowering> GlobalLowering(
       TargetGlobalInitLowering::createLowering(Ctx->getTargetArch(), Ctx));
   bool DisableTranslation = Ctx->getFlags().DisableTranslation;
   const bool DumpGlobalVariables =
diff --git a/src/PNaClTranslator.cpp b/src/PNaClTranslator.cpp
index 042b7fe..9c1b65fd 100644
--- a/src/PNaClTranslator.cpp
+++ b/src/PNaClTranslator.cpp
@@ -12,6 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/SmallString.h"
 #include "llvm/Analysis/NaCl/PNaClABIProps.h"
 #include "llvm/Bitcode/NaCl/NaClBitcodeDecoders.h"
 #include "llvm/Bitcode/NaCl/NaClBitcodeHeader.h"
@@ -35,6 +36,8 @@
 #include "IceTypeConverter.h"
 #include "PNaClTranslator.h"
 
+#include <memory>
+
 namespace {
 using namespace llvm;
 
@@ -2827,14 +2830,15 @@
 namespace Ice {
 
 void PNaClTranslator::translate(const std::string &IRFilename) {
-  OwningPtr<MemoryBuffer> MemBuf;
-  if (error_code ec =
-          MemoryBuffer::getFileOrSTDIN(IRFilename.c_str(), MemBuf)) {
-    errs() << "Error reading '" << IRFilename << "': " << ec.message() << "\n";
+  ErrorOr<std::unique_ptr<MemoryBuffer>> ErrOrFile =
+      MemoryBuffer::getFileOrSTDIN(IRFilename);
+  if (std::error_code EC = ErrOrFile.getError()) {
+    errs() << "Error reading '" << IRFilename << "': " << EC.message() << "\n";
     ErrorStatus = true;
     return;
   }
 
+  std::unique_ptr<MemoryBuffer> MemBuf(ErrOrFile.get().release());
   if (MemBuf->getBufferSize() % 4 != 0) {
     errs() << IRFilename
            << ": Bitcode stream should be a multiple of 4 bytes in length.\n";