diff --git a/Source/Core/Core/MemoryWatcher.cpp b/Source/Core/Core/MemoryWatcher.cpp
index 5793a0626541..590cf091856e 100644
--- a/Source/Core/Core/MemoryWatcher.cpp
+++ b/Source/Core/Core/MemoryWatcher.cpp
@@ -141,7 +141,7 @@ void MemoryWatcher::Step()
 #ifdef _WIN32
       unsigned long written;
       if (m_pipe != INVALID_HANDLE_VALUE)
-        WriteFile(m_pipe, message.c_str(), static_cast<DWORD>(message.size() + 1), &m_written,
+        WriteFile(m_pipe, message.c_str(), static_cast<DWORD>(message.size() + 1), &written,
                   nullptr);
 #else
       sendto(m_fd, message.c_str(), message.size() + 1, 0, reinterpret_cast<sockaddr*>(&m_addr),