diff --git a/clang/include/clang/ARCMigrate/ARCMT.h b/clang/include/clang/ARCMigrate/ARCMT.h
index 49e94a92cd0bc..2b950e3d2cc2b 100644
--- a/clang/include/clang/ARCMigrate/ARCMT.h
+++ b/clang/include/clang/ARCMigrate/ARCMT.h
@@ -102,7 +102,7 @@ class MigrationProcess {
 public:
   bool HadARCErrors;
 
-  MigrationProcess(const CompilerInvocation &CI,
+  MigrationProcess(CompilerInvocation &CI,
                    std::shared_ptr<PCHContainerOperations> PCHContainerOps,
                    DiagnosticConsumer *diagClient,
                    StringRef outputDir = StringRef());
diff --git a/clang/lib/ARCMigrate/ARCMT.cpp b/clang/lib/ARCMigrate/ARCMT.cpp
index ea0f25a689116..84c7339317892 100644
--- a/clang/lib/ARCMigrate/ARCMT.cpp
+++ b/clang/lib/ARCMigrate/ARCMT.cpp
@@ -505,7 +505,7 @@ class RewritesApplicator : public TransformActions::RewriteReceiver {
 MigrationProcess::RewriteListener::~RewriteListener() { }
 
 MigrationProcess::MigrationProcess(
-    const CompilerInvocation &CI,
+    CompilerInvocation &CI,
     std::shared_ptr<PCHContainerOperations> PCHContainerOps,
     DiagnosticConsumer *diagClient, StringRef outputDir)
     : OrigCI(CI), PCHContainerOps(std::move(PCHContainerOps)),