diff --git a/sysconfig.h b/sysconfig.h
index 968e3ab8..d79ead9c 100644
--- a/sysconfig.h
+++ b/sysconfig.h
@@ -445,6 +445,7 @@
 #define SDLK_DELETE (123052)
 #define SDLK_KP_ENTER (123054)
 #define SDLK_BACKSPACE (123055)
+#define SDLK_TAB (123056)
 #define FAKE_SDL
 typedef int SDL_Event;
 typedef unsigned int Uint32;