-_GL_CXXALIAS_SYS (sendto, ssize_t,
- (int fd, const void *buf, size_t len, int flags,
- const struct sockaddr *to, socklen_t tolen));
+/* Need to cast, because on NonStop Kernel, the sixth parameter is
+ size_t tolen. */
+_GL_CXXALIAS_SYS_CAST (sendto, ssize_t,
+ (int fd, const void *buf, size_t len, int flags,
+ const struct sockaddr *to, socklen_t tolen));