Olá pessoas, boa noite.

estou tendo o seguinte erro, algúem poderia me ajudar?

In file included from C:\Users\Marcio\Documents\Arduino\libraries\etherShield/etherShield.h:25:0,
from sketch_oct21e.ino:1:
C:\Users\Marcio\Documents\Arduino\libraries\etherShield/ip_arp_udp_tcp.h:32:66: error: 'prog_char' does not name a type
extern uint16_t fill_tcp_data_p(uint8_t *buf,uint16_t pos, const prog_char *progmem_s);
^
C:\Users\Marcio\Documents\Arduino\libraries\etherShield/ip_arp_udp_tcp.h:32:77: error: ISO C++ forbids declaration of 'progmem_s' with no type [-fpermissive]
extern uint16_t fill_tcp_data_p(uint8_t *buf,uint16_t pos, const prog_char *progmem_s);
^
In file included from sketch_oct21e.ino:1:0:
C:\Users\Marcio\Documents\Arduino\libraries\etherShield/etherShield.h:34:65: error: 'prog_char' does not name a type
uint16_t ES_fill_tcp_data_p(uint8_t *buf,uint16_t pos, const prog_char *progmem_s);
^
C:\Users\Marcio\Documents\Arduino\libraries\etherShield/etherShield.h:34:76: error: ISO C++ forbids declaration of 'progmem_s' with no type [-fpermissive]
uint16_t ES_fill_tcp_data_p(uint8_t *buf,uint16_t pos, const prog_char *progmem_s);
^
Erro compilando.