Gsm shield prog_char has not been declared

Hardware Arduino GSM Shield
4

Hi,
I have the same problem, but I con't upload to arduino IDE 1.5.x

With arduino-1.0.4 on gentoo, I try to compile SendSMS and I go this errors:

In file included from /usr/share/arduino/libraries/GSM/GSM3ShieldV1ModemCore.h:39:0,
                 from /usr/share/arduino/libraries/GSM/GSM3ShieldV1AccessProvider.h:38,
                 from /usr/share/arduino/libraries/GSM/GSM.h:45,
                 from SendSMS.ino:25:
/usr/share/arduino/libraries/GSM/GSM3ShieldV1BaseProvider.h:57:32: error: ‘prog_char’ has not been declared
In file included from /usr/share/arduino/libraries/GSM/GSM3ShieldV1AccessProvider.h:38:0,
                 from /usr/share/arduino/libraries/GSM/GSM.h:45,
                 from SendSMS.ino:25:
/usr/share/arduino/libraries/GSM/GSM3ShieldV1ModemCore.h:170:35: error: ‘prog_char’ has not been declared
/usr/share/arduino/libraries/GSM/GSM3ShieldV1ModemCore.h:189:34: error: ‘prog_char’ has not been declared

I got the same problem also with the 1.0.5

Somebody can help me?

Tanks in advance