# elif defined _MSC_VER
# include <malloc.h>
# define alloca _alloca
+# elif defined __DECC && defined __VMS
+# define alloca __ALLOCA
# else
# include <stddef.h>
-# if defined __DECC && defined __VMS
-# define alloca __ALLOCA
-# endif
# ifdef __cplusplus
extern "C"
# endif