diff --git a/gfx/drivers_renderchain/d3d9_cg_renderchain.cpp b/gfx/drivers_renderchain/d3d9_cg_renderchain.cpp
index 1e37447c92..c982e9734f 100644
--- a/gfx/drivers_renderchain/d3d9_cg_renderchain.cpp
+++ b/gfx/drivers_renderchain/d3d9_cg_renderchain.cpp
@@ -41,6 +41,8 @@
 
 #define cg_d3d9_set_param_1f(param, x) if (param) cgD3D9SetUniform(param, x)
 
+#define D3D_PI 3.14159265358979323846264338327
+
 namespace
 {
    struct lut_info
@@ -1152,7 +1154,7 @@ static void renderchain_set_mvp(
 
    D3DXMatrixOrthoOffCenterLH(&ortho, 0, vp_width, 0, vp_height, 0, 1);
    D3DXMatrixIdentity(&rot);
-   D3DXMatrixRotationZ(&rot, rotation * (M_PI / 2.0));
+   D3DXMatrixRotationZ(&rot, rotation * (D3D_PI / 2.0));
 
    D3DXMatrixMultiply(&proj, &ortho, &rot);
    D3DXMatrixTranspose(&tmp, &proj);