# ifndef HAVE_B64_NTOP
int b64_ntop(u_char const *src, size_t srclength, char *target,
size_t targsize);
-int b64_pton(char const *src, u_char *target, size_t targsize);
# endif /* !HAVE_B64_NTOP */
# define __b64_ntop b64_ntop
-# define __b64_pton b64_pton
#endif /* HAVE___B64_NTOP */
+#ifndef HAVE___B64_PTON
+# ifndef HAVE_B64_PTON
+int b64_pton(char const *src, u_char *target, size_t targsize);
+# endif /* !HAVE_B64_PTON */
+# define __b64_pton b64_pton
+#endif /* HAVE___B64_PTON */
+
#endif /* _BSD_BASE64_H */