diff --git a/LibreNMS/Data/Graphing/GraphParameters.php b/LibreNMS/Data/Graphing/GraphParameters.php
index df68127d000b..dbb769ae7bd4 100644
--- a/LibreNMS/Data/Graphing/GraphParameters.php
+++ b/LibreNMS/Data/Graphing/GraphParameters.php
@@ -104,6 +104,9 @@ public function __construct(array $vars)
         $this->to = empty($vars['to']) ? time() : Time::parseAt($vars['to']);
         $this->period = $this->to - $this->from;
         $this->prev_from = $this->from - $this->period;
+        $this->scale_min = $vars['scale_min'] ?? null;
+        $this->scale_max = $vars['scale_max'] ?? null;
+        $this->scale_rigid = isset($vars['scale_rigid']) && $vars['scale_rigid'] && $vars['scale_rigid'] !== 'no';
 
         $this->inverse = ! empty($vars['inverse']);
         $this->in = $this->inverse ? 'out' : 'in';
diff --git a/includes/html/graphs/device/ping_perf.inc.php b/includes/html/graphs/device/ping_perf.inc.php
index d68a4ef684e7..8d5df04786c5 100644
--- a/includes/html/graphs/device/ping_perf.inc.php
+++ b/includes/html/graphs/device/ping_perf.inc.php
@@ -16,5 +16,6 @@
 
 $descr = 'Milliseconds';
 $ds = 'ping';
+$scale_min = 0;
 
 require 'includes/html/graphs/generic_stats.inc.php';