diff --git a/stepmania/src/StepMania.cpp b/stepmania/src/StepMania.cpp
index 125f49b4ee..a7f99b0b78 100644
--- a/stepmania/src/StepMania.cpp
+++ b/stepmania/src/StepMania.cpp
@@ -224,7 +224,7 @@ static void BoostAppPri()
 #endif
 
 #include "archutils/Win32/VideoDriverInfo.h"
-#include "Regex.h"
+#include "regex.h"
 
 static const CString D3DURL = "http://search.microsoft.com/gomsuri.asp?n=1&c=rp_BestBets&siteid=us&target=http://www.microsoft.com/downloads/details.aspx?FamilyID=a19bed22-0b25-4e5d-a584-6389d8a3dad0&displaylang=en";