diff --git a/lib/Site/PSVar.pm b/lib/Site/PSVar.pm
index 2c253e4d38c2fa160a64f7f0aca225032dc6883a..456c054fb1a65cbc11be28831c58b6b68b1956c3 100644
--- a/lib/Site/PSVar.pm
+++ b/lib/Site/PSVar.pm
@@ -63,7 +63,13 @@ sub handler {
     my @values = split(/\n/, $output);
     my $title = shift @values;
     my @sorted = sort @values;
-    my $value = ( $aggr eq 'max' ) ? pop @sorted : shift @sorted;
+    my $value;
+    if (scalar @value) {
+       $value = ( $aggr eq 'max' ) ? pop @sorted : shift @sorted;
+    }
+    else {
+       $value = 0
+    }
 
 
     return {