diff --git a/lib/Support/Windows/Threading.inc b/lib/Support/Windows/Threading.inc
index decb488..0bd92f6 100644
--- a/lib/Support/Windows/Threading.inc
+++ b/lib/Support/Windows/Threading.inc
@@ -14,7 +14,7 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/Twine.h"
 
-#include "Windows/WindowsSupport.h"
+#include "WindowsSupport.h"
 #include <process.h>
 
 // Windows will at times define MemoryFence.