nonportable pointer conversion

I have an error :
C:\WINDOWS\Desktop\Nate\c>bcc32 word.c
Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland
word.c:
Warning W8069 word.c 47: Nonportable pointer conversion in function main
Warning W8069 word.c 47: Nonportable pointer conversion in function main
Turbo Incremental Link 5.00 Copyright (c) 1997, 2000 Borland

here is a snip of the code. Post if you need a bigger selection

Code:

/*---------cut here-----------*/
if ((fd=fopen(argv[0], "r")) == NULL)
{
     printf("File execution failure\n");
     return 1;
}

strcpy(word,argv[2]);
while ( (fread(buf, sizeof(char),MAX ,fd )) != EOF) //line of error
{
	while ((result = search(buf, word, strlen(word)-1))!=1)
		printf("%d)     %s",x++,*result);
}
/*----------cut here-----------*/

What are buf, MAX and fd defined as?

char *buf
FILE *fd
#define MAX 80

Sorry I didn't define those in the post

Salem,

I was looking at the man page for fopen on Solarisv7, and I noticed this, said in relation to the options "r" or "rb"...

" The character b has no effect, but is allowed for ISO C
standard conformance (see standards(5))..."

Is this something specific to the Solaris compiler?