--- src/render/direct3d11/SDL_render_d3d11.c.orig	2015-03-21 20:17:57.816864185 +0100
+++ src/render/direct3d11/SDL_render_d3d11.c	2015-03-21 22:16:38.285858676 +0100
@@ -132,12 +132,24 @@
 
 
 /* Defined here so we don't have to include uuid.lib */
+#ifndef __IDXGIFactory2_INTERFACE_DEFINED__
 static const GUID IID_IDXGIFactory2 = { 0x50c83a1c, 0xe072, 0x4c48, { 0x87, 0xb0, 0x36, 0x30, 0xfa, 0x36, 0xa6, 0xd0 } };
+#endif
+#ifndef __IDXGIDevice1_INTERFACE_DEFINED__
 static const GUID IID_IDXGIDevice1 = { 0x77db970f, 0x6276, 0x48ba, { 0xba, 0x28, 0x07, 0x01, 0x43, 0xb4, 0x39, 0x2c } };
+#endif
+#ifndef __ID3D11Texture2D_INTERFACE_DEFINED__
 static const GUID IID_ID3D11Texture2D = { 0x6f15aaf2, 0xd208, 0x4e89, { 0x9a, 0xb4, 0x48, 0x95, 0x35, 0xd3, 0x4f, 0x9c } };
+#endif
+#ifndef __ID3D11Device1_INTERFACE_DEFINED__
 static const GUID IID_ID3D11Device1 = { 0xa04bfb29, 0x08ef, 0x43d6, { 0xa4, 0x9c, 0xa9, 0xbd, 0xbd, 0xcb, 0xe6, 0x86 } };
+#endif
+#ifndef __ID3D11DeviceContext1_INTERFACE_DEFINED__
 static const GUID IID_ID3D11DeviceContext1 = { 0xbb2c6faa, 0xb5fb, 0x4082, { 0x8e, 0x6b, 0x38, 0x8b, 0x8c, 0xfa, 0x90, 0xe1 } };
+#endif
+#ifndef __ID3D11Debug_INTERFACE_DEFINED__
 static const GUID IID_ID3D11Debug = { 0x79cf2233, 0x7536, 0x4948, { 0x9d, 0x36, 0x1e, 0x46, 0x92, 0xdc, 0x57, 0x60 } };
+#endif
 
 /* Direct3D 11.x shaders