diff --git a/ACU/Trace.pm b/ACU/Trace.pm
index f036e9b..33dd018 100644
--- a/ACU/Trace.pm
+++ b/ACU/Trace.pm
@@ -374,7 +374,7 @@ sub getValue
     my $login = shift;
 
     my $value = 0;
-    if (!$login || $self->{who}{type} eq "group" || $self->{who}{login} eq $login)
+    if (!$login || !exists $self->{who} || $self->{who}{type} eq "group" || $self->{who}{login} eq $login)
     {
 	foreach my $key (%{ $self->{values} })
 	{