--- Libc/Libc-583/include/readpassphrase.h
+++ Libc/Libc-320/include/readpassphrase.h
@@ -38,12 +38,7 @@
 #define RPP_FORCEUPPER  0x08		/* Force input to upper case. */
 #define RPP_SEVENBIT    0x10		/* Strip the high bit from input. */
 
-#include <_types.h>
-
-#ifndef _SIZE_T
-#define _SIZE_T
-typedef	__darwin_size_t	size_t;
-#endif
+#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 char * readpassphrase(const char *, char *, size_t, int);