diff --git a/llvm/lib/Fuzzer/CMakeLists.txt b/llvm/lib/Fuzzer/CMakeLists.txt
index 7e41ef89e67c..4b947d87e6d0 100644
--- a/llvm/lib/Fuzzer/CMakeLists.txt
+++ b/llvm/lib/Fuzzer/CMakeLists.txt
@@ -22,6 +22,7 @@ if( LLVM_USE_SANITIZE_COVERAGE )
     FuzzerMutate.cpp
     FuzzerSHA1.cpp
     FuzzerShmemPosix.cpp
+    FuzzerShmemWindows.cpp
     FuzzerTracePC.cpp
     FuzzerTraceState.cpp
     FuzzerUtil.cpp
diff --git a/llvm/lib/Fuzzer/FuzzerShmemWindows.cpp b/llvm/lib/Fuzzer/FuzzerShmemWindows.cpp
new file mode 100644
index 000000000000..6325b4b8e5b4
--- /dev/null
+++ b/llvm/lib/Fuzzer/FuzzerShmemWindows.cpp
@@ -0,0 +1,64 @@
+//===- FuzzerShmemWindows.cpp - Posix shared memory -------------*- C++ -* ===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// SharedMemoryRegion
+//===----------------------------------------------------------------------===//
+#include "FuzzerDefs.h"
+#if LIBFUZZER_WINDOWS
+
+#include "FuzzerIO.h"
+#include "FuzzerShmem.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+namespace fuzzer {
+
+std::string SharedMemoryRegion::Path(const char *Name) {
+  return DirPlusFile(TmpDir(), Name);
+}
+
+std::string SharedMemoryRegion::SemName(const char *Name, int Idx) {
+  std::string Res(Name);
+  return Res + (char)('0' + Idx);
+}
+
+bool SharedMemoryRegion::Map(int fd) {
+  assert(0 && "UNIMPLEMENTED");
+  return false;
+}
+
+bool SharedMemoryRegion::Create(const char *Name) {
+  assert(0 && "UNIMPLEMENTED");
+  return false;
+}
+
+bool SharedMemoryRegion::Open(const char *Name) {
+  assert(0 && "UNIMPLEMENTED");
+  return false;
+}
+
+bool SharedMemoryRegion::Destroy(const char *Name) {
+  assert(0 && "UNIMPLEMENTED");
+  return false;
+}
+
+void SharedMemoryRegion::Post(int Idx) {
+  assert(0 && "UNIMPLEMENTED");
+}
+
+void SharedMemoryRegion::Wait(int Idx) {
+  Semaphore[1] = nullptr;
+  assert(0 && "UNIMPLEMENTED");
+}
+
+}  // namespace fuzzer
+
+#endif  // LIBFUZZER_WINDOWS