1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Nagios/Plugin/Performance.pm b/lib/Nagios/Plugin/Performance.pm
index 6e4cd03..fc1c0bc 100644
--- a/lib/Nagios/Plugin/Performance.pm
+++ b/lib/Nagios/Plugin/Performance.pm
@@ -22,7 +22,7 @@ struct "Nagios::Plugin::Performance" => {
 
 sub perfoutput {
         my $self = shift;
-        my $output = $self->label."=".$self->value.$self->uom.";".$self->threshold->warning.";".$self->threshold->critical;
+        my $output = $self->label."=".$self->value. ($self->uom || "") .";".$self->threshold->warning.";".$self->threshold->critical;
         return $output;
 }