error help

i keep getting an error here and i cant seem to figure it out... for some reason =/

Code:

#include <ncurses.h>


int main()
{

int num = 0;

 initscr();
 noecho();
 cbreak();
 keypad(stdscr,TRUE);
 
 if(has_color())
 {
   start_color();

 init_pair(1,COLOR_WHITE,  COLOR_BLUE);
 init_pair(2,COLOR_BLUE,   COLOR_WHITE);
 init_pair(3,COLOR_RED,    COLOR_WHITE);
 curs_set(0);
 }

 for(;;)
 {
    int ch = getch();
    attrset(COLOR_PAIR(num % 8));
    num++;
 }
   finish(0);

   refresh();
   endwin();
   return 0;
}

here is the error:

/tmp/cc0TsutE.o: In function `main':
/tmp/cc0TsutE.o(.text+0x30): undefined reference to `has_color'
collect2: ld returned 1 exit status


can anyone tell me what this meanz..?

ahh nm i got it =) i was missing the (s)