Removed redundant #ifdef
diff --git a/src/video/windows/SDL_windowsmessagebox.c b/src/video/windows/SDL_windowsmessagebox.c
index e50c542..b2a5953 100644
--- a/src/video/windows/SDL_windowsmessagebox.c
+++ b/src/video/windows/SDL_windowsmessagebox.c
@@ -22,9 +22,7 @@
#if SDL_VIDEO_DRIVER_WINDOWS
-#if defined(__WIN32__)
#include "../../core/windows/SDL_windows.h"
-#endif
#include "SDL_assert.h"
#include "SDL_windowsvideo.h"