diff --git a/src/xenia/base/threading.h b/src/xenia/base/threading.h
index 26e5267bf..c0ac71647 100644
--- a/src/xenia/base/threading.h
+++ b/src/xenia/base/threading.h
@@ -402,7 +402,7 @@ class Timer : public WaitHandle {
   virtual bool Cancel() = 0;
 };
 
-#if XE_PLATFORM_WINDOWS
+#if XE_PLATFORM_WIN32
 struct ThreadPriority {
   static const int32_t kLowest = -2;
   static const int32_t kBelowNormal = -1;