diff -urN sdlmame/3rdparty/bgfx/include/bgfx/bgfxplatform.h sdlmame-patched/3rdparty/bgfx/include/bgfx/bgfxplatform.h
--- sdlmame/3rdparty/bgfx/include/bgfx/bgfxplatform.h	2016-05-25 09:33:26.000000000 +0930
+++ sdlmame-patched/3rdparty/bgfx/include/bgfx/bgfxplatform.h	2018-05-01 11:11:50.452023439 +0930
@@ -253,7 +253,7 @@
 
 #endif // BX_PLATFORM_
 
-#if defined(_SDL_syswm_h)
+#if defined(_SDL_syswm_h) || defined(SDL_syswm_h_)
 // If SDL_syswm.h is included before bgfxplatform.h we can enable SDL window
 // interop convenience code.