# include <stdarg.h> /* va_list */
#endif
-#ifndef HAVE_GETPID
-# include <sys/types.h> /* pid_t */
+#if !defined (HAVE_GETDELIM) || \
+ !defined (HAVE_GETPID) || \
+ !defined (HAVE_SWAB)
+# include <sys/types.h> /* ssize_t, pid_t */
#endif
#ifdef __cplusplus