diff --git a/src/d3d/rwd3d.h b/src/d3d/rwd3d.h
index babaeda..bc0014b 100644
--- a/src/d3d/rwd3d.h
+++ b/src/d3d/rwd3d.h
@@ -1,4 +1,5 @@
 #ifdef RW_D3D9
+#define NOMINMAX
 #include <d3d9.h>
 #endif