wrong output in matlab coding

actually i have a simple code and what i am actually doing is that i am generating a signal and then i am delaying that signal and then i am correlating the signal but in the correlation plot i am getting the peak at zero. should the be at zero??

output:

code:

t=linspace(0,1000,100001);  %in ms
xs=randn(1,100001);

grid on

subplot(3,1,1)
plot(t,xs)
title('SIGNAL RECEIVED AT MASTER')

shift_ms = 10;
%SIGNAL RECEIVED AT RECEIVER 1(TIME DELAYING THE DISCRETE SIGNAL)
x1=circshift(xs,5); %signal received at receiver 1
subplot(3,1,2)
plot(t,x1)
title('SIGNAL RECEIVED AT RECEIVER#1')

[c,lags]=xcorr(xs,x1);
subplot(3,1,3)
plot(lags,c)
title('CORRELATION OF RECEIVER 1 AND PROCESSING UNIT')
[maxval indx]=max(c) %[xMax,idx] = max(x) returns two outputs.first is max value of x and second is max index value
maxval;
shiftCalc_ms = (length(t)-indx);
t21 = finddelay(xs,x1)