8051.h error in Keil, simple C blink-LED code test

I'm trying to set up and test an 8051 development board. I'm using Keil uVision 4, with some code examples included with the dev board. The included hex file examples upload to the 8051 and work perfectly.

My problem is in Keil (4.72.9.0), when I try to build a new hex file from a uVision project file, there is an error with the 8051.h library. The 8051.h file is listed as a Source Group 1 item.

Error text:
compiling LED.c...
8051.h(29): error C129: missing ';' before '__at'
Target not created

Here is my code:

/**********
Blink LED
***********/
#include "8051.h"
sbit led=P2^0;
void delay(unsigned int time);
void main(void)
{
        while(1)
        {
                led = led;
        delay(40000);
                delay(20000);
                delay(20000);
                delay(20000);
        /*
            led=1;
                delay(20000);
                led=0;
                delay(20000);
                */
        }
}
void delay(unsigned int time)
{
        while(time--);
}

Do I have bad 8051.h files, or what fix may be necessary to correct this? I have tried multiple 8051.h files.

Any guidance appreciated.