gtags-cscope showing wrong Function

Hello,

I have ran into an issue with gtags-cscope where it shows the wrong 
function (aka the caller).

given the following source:

void foo()
{
	printf("hello foo\n");
}

int main(int argc, char *argv[])
{
	printf("hello world\n");
	foo();
	return 0;
}

After you generate gtags, when you run gtags-cscope and look for the 
symbol foo, you will get the following output:
Symbol: foo

   File  Function Line
0 foo.c foo       3 void foo()
1 foo.c foo      11 foo();          <<<<<<<<<<<


With cscope you would see under Function the caller i.e:
C symbol: foo

   File  Function Line
0 foo.c foo       3 void foo()
1 foo.c main     11 foo();          <<<<<<<<<<<

My gtags version is 6.6.3, no special configurations

Is there something I need to configure in order to get the same behavior 
as cscope?

Thanks in advance,
-- Jon.