diff --git a/client/example.pl b/client/example.pl
index d6962ed..3637a33 100755
--- a/client/example.pl
+++ b/client/example.pl
@@ -41,6 +41,7 @@ my $remote_port;
 # The example agent uses $state to hold its state structure. It is
 # a HASHREF with the following fields:
 # {
+# 	agent_id => NUMBER (agent id)
 # 	tick => NUMBER (current tick id)
 # 	energy => NUMBER (current energy)
 # 	visual => [
@@ -84,6 +85,10 @@ sub tick($$) {
 			print "[ii] bred $id ($g)\n";
 			system("screen ./$0 $remote_port $id $g");
 
+		} elsif ($type eq 'agent_id') {
+			$value =~ /^\d+$/ or die "[ee] type agent_id wrong value ($value)\n";
+			$state->{agent_id} = $value;
+
 		} elsif ($type eq 'tick') {
 			$value =~ /^\d+$/ or die "[ee] type tick wrong value ($value)\n";
 			$state->{tick} =  $value;
@@ -287,7 +292,7 @@ my $state = { gender => $gender };
 while (1) {
 	tick($socket, $state);
 	# Debug print
-	print $state->{energy} . "\n";
+	print $state->{agent_id} . " " .$state->{energy} . "\n";
 	print "visual [", join('], [', @{$state->{visual}}), "]\n";
 	# The following could be written more succintly, but it is here
 	# to show possible iteration over pheromones: