input and if

Could anybody give me a hint on how to solve this.
Below you can find the virtual vire code for RX.
I am reciving the message “hello 6” and trying to do something when buf[6] is equal to 6.
Could it be that i am not converting the value so it can be compared?
When i serial print the buf[6] it prints 6 but when i compare it in the “if” code it does not see it as a 6.

#include <VirtualWire.h>

#undef int
#undef abs
#undef double
#undef float
#undef round

void setup()
vw_setup(2000); // Bits per sec
vw_rx_start(); // Start the receiver PLL running

void loop()
uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;

  if (vw_get_message(buf, &buflen)) {
   int i;
   Serial.print("Got: ");
    for (i = 0; i < buflen; i++) {
     Serial.print(buf[i], BYTE);
     Serial.print(" ");
    if (buf[6] == 6) { Serial.println("ON"); }

Simple solution, found it on my own.
The solution is to write:

if (buf[6] == '6') {

instead of

if (buf[6] == 6) {

I do not technically why but it works.

buf[6] == 6

is checking to see if the character has ASCII value 6.

buf[6] == '6'

is checking if the character is the character 6.