diff --git a/WickedEngine/wiMath.h b/WickedEngine/wiMath.h
index dcee086ce..d0376ba37 100644
--- a/WickedEngine/wiMath.h
+++ b/WickedEngine/wiMath.h
@@ -5,13 +5,12 @@
 #include <algorithm>
 #include <limits>
 
-#define _XM_F16C_INTRINSICS_
-#define _XM_FMA3_INTRINSICS_
-
 #if __has_include("DirectXMath.h")
 // In this case, DirectXMath is coming from Windows SDK.
 //	It is better to use this on Windows as some Windows libraries could depend on the same
 //	DirectXMath headers
+#define _XM_F16C_INTRINSICS_
+#define _XM_FMA3_INTRINSICS_
 #include <DirectXMath.h>
 #include <DirectXPackedVector.h>
 #include <DirectXCollision.h>