diff --git a/centreon/plugins/values.pm b/centreon/plugins/values.pm
index 741774561..92d7968dd 100644
--- a/centreon/plugins/values.pm
+++ b/centreon/plugins/values.pm
@@ -93,6 +93,8 @@ sub calc {
             $self->{result_values}->{$value->{name}} = ($options{new_datas}->{$self->{instance} . '_' . $value->{name}} - $options{old_datas}->{$self->{instance} . '_' . $value->{name}}) / $options{delta_time};
         } elsif (defined($value->{per_minute}) && $value->{per_minute} == 1) {
             $self->{result_values}->{$value->{name}} = ($options{new_datas}->{$self->{instance} . '_' . $value->{name}} - $options{old_datas}->{$self->{instance} . '_' . $value->{name}}) / ($options{delta_time} / 60);
+        } elsif (defined($value->{per_hour}) && $value->{per_hour} == 1) {
+            $self->{result_values}->{$value->{name}} = ($options{new_datas}->{$self->{instance} . '_' . $value->{name}} - $options{old_datas}->{$self->{instance} . '_' . $value->{name}}) / ($options{delta_time} / 3600);
         } else {
             $self->{result_values}->{$value->{name}} = $options{new_datas}->{$self->{instance} . '_' . $value->{name}};
         }