updated includes for _exit()
diff --git a/src/SDL.c b/src/SDL.c
index b7e68c4..7515a30 100644
--- a/src/SDL.c
+++ b/src/SDL.c
@@ -22,8 +22,10 @@
#if defined(__WIN32__)
#include "core/windows/SDL_windows.h"
+#elif defined(__OS2__)
+#include <stdlib.h> /* For _exit() */
#elif !defined(__WINRT__)
-#include <unistd.h> // For _exit(), etc.
+#include <unistd.h> /* For _exit(), etc. */
#endif
#if defined(__EMSCRIPTEN__)