diff --git a/Contrib/Math/Source/MyMath.c b/Contrib/Math/Source/MyMath.c
index 72047e79..77d21c29 100644
--- a/Contrib/Math/Source/MyMath.c
+++ b/Contrib/Math/Source/MyMath.c
@@ -1,5 +1,5 @@
 #include <windows.h>
-#include "Mathcrt.h"
+#include "mathcrt.h"
 #include "MyMath.h"
 #include "Math.h"