diff --git a/Source/Core/Common/x64CPUDetect.cpp b/Source/Core/Common/x64CPUDetect.cpp
index d1e9d53273..fa9cb0c15c 100644
--- a/Source/Core/Common/x64CPUDetect.cpp
+++ b/Source/Core/Common/x64CPUDetect.cpp
@@ -22,7 +22,7 @@
 #include "Common/MsgHandler.h"
 #endif
 
-#ifndef _WIN32
+#ifndef _MSC_VER
 
 #ifdef __FreeBSD__
 #include <unistd.h>
@@ -110,7 +110,7 @@ CPUInfo::CPUInfo()
 
 void CPUInfo::Detect()
 {
-#ifdef _WIN32
+#ifdef _MSC_VER
   WarnIfRunningUnderEmulation();
 #endif