diff --git a/llvm/lib/Support/FileOutputBuffer.cpp b/llvm/lib/Support/FileOutputBuffer.cpp
index 2e740ca..94bcdc5 100644
--- a/llvm/lib/Support/FileOutputBuffer.cpp
+++ b/llvm/lib/Support/FileOutputBuffer.cpp
@@ -87,7 +87,7 @@
 
 std::error_code FileOutputBuffer::commit(int64_t NewSmallerSize) {
   // Unmap buffer, letting OS flush dirty pages to file on disk.
-  Region.reset(nullptr);
+  Region.reset();
 
   // If requested, resize file as part of commit.
   if ( NewSmallerSize != -1 ) {