diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index c6948eb..eacba7d 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -7,6 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "clang/Frontend/CompilerInvocation.h"
 #include "TestModuleFileExtension.h"
 #include "clang/Basic/Builtins.h"
 #include "clang/Basic/FileManager.h"
@@ -15,11 +16,11 @@
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/Options.h"
 #include "clang/Driver/Util.h"
-#include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Frontend/FrontendDiagnostic.h"
 #include "clang/Frontend/LangStandard.h"
 #include "clang/Frontend/Utils.h"
 #include "clang/Lex/HeaderSearchOptions.h"
+#include "clang/Lex/PreprocessorOptions.h"
 #include "clang/Serialization/ASTReader.h"
 #include "clang/Serialization/ModuleFileExtension.h"
 #include "llvm/ADT/Hashing.h"