diff --git a/include/ac/stdlib.h b/include/ac/stdlib.h
index 929afafd11..505b30b5cf 100644
--- a/include/ac/stdlib.h
+++ b/include/ac/stdlib.h
@@ -19,4 +19,9 @@
 #		include <malloc.h>
 #	endif
 
+#	ifndef EXIT_SUCCESS
+#		define EXIT_SUCCESS 0
+#		define EXIT_FAILURE 1
+#	endif
+
 #endif /* _AC_STDLIB_H */