diff --git a/Source/Core/Common/Semaphore.h b/Source/Core/Common/Semaphore.h
index d132288f2a..731d070929 100644
--- a/Source/Core/Common/Semaphore.h
+++ b/Source/Core/Common/Semaphore.h
@@ -6,9 +6,6 @@
 
 #ifdef _WIN32
 
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
 #include <Windows.h>
 
 namespace Common