diff --git a/includes/polling/applications/smart.inc.php b/includes/polling/applications/smart.inc.php
index d87d0dfc5527..933ea5343509 100644
--- a/includes/polling/applications/smart.inc.php
+++ b/includes/polling/applications/smart.inc.php
@@ -132,28 +132,21 @@
     $int++;
 }
 
-# smart enhancement id9
 
+# smart enhancement id9
 $rrd_name = array('app', $name, $app_id);
 $rrd_def = RrdDefinition::make()
     ->addDataset('id9', 'GAUGE', 0);
 
 $int=0;
-$metrics = array();
 while (isset($lines[$int])) {
     list($disk, , , , , , , , , , , , , , , , , , , , , , , , , $id9)=explode(",", $lines[$int]);
 
-    if (is_int($id9)) {
-        $id=null;
-    }
-
     $rrd_name = array('app', $name.'_id9', $app_id, $disk);
 
-    $fields = array(
-        'id9'=>$id9
-    );
-
-    $metrics[$disk] = $fields;
+    $fields = ['id9' => $id9];
+    $metrics[$disk]['id9'] = $id9;
+    
     $tags = array('name' => $name, 'app_id' => $app_id, 'rrd_def' => $rrd_def, 'rrd_name' => $rrd_name);
     data_update($device, 'app', $tags, $fields);