diff --git a/lib/ARCMigrate/FileRemapper.cpp b/lib/ARCMigrate/FileRemapper.cpp
index 159ab79..5de13e6 100644
--- a/lib/ARCMigrate/FileRemapper.cpp
+++ b/lib/ARCMigrate/FileRemapper.cpp
@@ -175,9 +175,8 @@ bool FileRemapper::overwriteOriginal(DiagnosticsEngine &Diag,
          I = FromToMappings.begin(), E = FromToMappings.end(); I != E; ++I) {
     const FileEntry *origFE = I->first;
     if (const FileEntry *newFE = I->second.dyn_cast<const FileEntry *>()) {
-      if (fs::copy_file(newFE->getName(), origFE->getName(),
-                 fs::copy_option::overwrite_if_exists) != llvm::errc::success)
-        return report(StringRef("Could not copy file '") + newFE->getName() +
+      if (fs::rename(newFE->getName(), origFE->getName()))
+        return report(StringRef("Could not rename file '") + newFE->getName() +
                       "' to file '" + origFE->getName() + "'", Diag);
     } else {