diff --git a/stepmania/src/Tls.cpp b/stepmania/src/Tls.cpp
index 082e669684..1c71ea741a 100644
--- a/stepmania/src/Tls.cpp
+++ b/stepmania/src/Tls.cpp
@@ -15,6 +15,7 @@
 //	along with this program; if not, write to the Free Software
 //	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
+#include "stdafx.h"
 #include "tls.h"
 #include "crash.h"