1 files changed, 2 insertions, 1 deletions

diff --git a/type/Default.class.php b/type/Default.class.php
index 8632328..416a352 100644
--- a/type/Default.class.php
+++ b/type/Default.class.php
@@ -219,7 +219,8 @@ class Type_Default {
                 $rrdgraph[] = sprintf('-h %d', is_numeric($this->heigth) ? $this->heigth : 175);
                 $rrdgraph[] = '-l 0';
                 $rrdgraph[] = sprintf('-t "%s on %s"', $this->rrd_title, $this->args['host']);
-                $rrdgraph[] = sprintf('-v "%s"', $this->rrd_vertical);
+                if ($this->rrd_vertical)
+                        $rrdgraph[] = sprintf('-v "%s"', $this->rrd_vertical);
                 $rrdgraph[] = sprintf('-s e-%d', is_numeric($this->seconds) ? $this->seconds : 86400);
 
                 return $rrdgraph;