diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index e9608715427b..ff593620fd83 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -22,6 +22,7 @@
 #include "llvm/MC/SubtargetFeature.h"
 #include "llvm/Module.h"
 #include "llvm/PassManager.h"
+#include "llvm/TargetTransformInfo.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FormattedStream.h"
 #include "llvm/Support/PrettyStackTrace.h"