diff --git a/src/www/widgets/api/plugins/system.inc b/src/www/widgets/api/plugins/system.inc
index c3f4cd0b3..98281861a 100644
--- a/src/www/widgets/api/plugins/system.inc
+++ b/src/www/widgets/api/plugins/system.inc
@@ -31,21 +31,31 @@ function system_api_cpu_stats()
     $cpustats = array();
     // take a short snapshot to calculate cpu usage
     $diff = array('user', 'nice', 'sys', 'intr', 'idle');
-    $cpuTicks1 = array_combine($diff, explode(" ", get_single_sysctl('kern.cp_time')));
+    $cpuTicks1 = array_combine($diff, array_slice(explode(" ", get_single_sysctl('kern.cp_time')),0, 5));
     usleep(100000);
-    $cpuTicks2 = array_combine($diff, explode(" ", get_single_sysctl('kern.cp_time')));
+    $cpuTicks2 = array_combine($diff, array_slice(explode(" ", get_single_sysctl('kern.cp_time')),0, 5));
     $totalStart = array_sum($cpuTicks1);
     $totalEnd = array_sum($cpuTicks2);
     if ($totalEnd <= $totalStart) {
         // if for some reason the measurement is invalid, assume nothing has changed (all 0)
         $totalEnd = $totalStart;
     }
-    $cpustats['used'] = floor(100 * (($totalEnd - $totalStart) - ($cpuTicks2['idle'] - $cpuTicks1['idle'])) / ($totalEnd - $totalStart));
-    $cpustats['user'] = floor(100 * (($cpuTicks2['user'] - $cpuTicks1['user'])) / ($totalEnd - $totalStart));
-    $cpustats['nice'] = floor(100 * (($cpuTicks2['nice'] - $cpuTicks1['nice'])) / ($totalEnd - $totalStart));
-    $cpustats['sys'] = floor(100 * (($cpuTicks2['sys'] - $cpuTicks1['sys'])) / ($totalEnd - $totalStart));
-    $cpustats['intr'] = floor(100 * (($cpuTicks2['intr'] - $cpuTicks1['intr'])) / ($totalEnd - $totalStart));
-    $cpustats['idle'] = floor(100 * (($cpuTicks2['idle'] - $cpuTicks1['idle'])) / ($totalEnd - $totalStart));
+    $totalDiff = $totalEnd - $totalStart;
+    if ($totalDiff != 0) {
+        $cpustats['used'] =  floor(100 * ($totalDiff - ($cpuTicks2['idle'] - $cpuTicks1['idle'])) / $totalDiff);
+        $cpustats['user'] = floor(100 * (($cpuTicks2['user'] - $cpuTicks1['user'])) / $totalDiff);
+        $cpustats['nice'] = floor(100 * (($cpuTicks2['nice'] - $cpuTicks1['nice'])) / $totalDiff);
+        $cpustats['sys'] = floor(100 * (($cpuTicks2['sys'] - $cpuTicks1['sys'])) / $totalDiff);
+        $cpustats['intr'] = floor(100 * (($cpuTicks2['intr'] - $cpuTicks1['intr'])) / $totalDiff);
+        $cpustats['idle'] = floor(100 * (($cpuTicks2['idle'] - $cpuTicks1['idle'])) / $totalDiff);
+    } else {
+        $cpustats['used'] = "0";
+        $cpustats['user'] = "0";
+        $cpustats['nice'] = "0";
+        $cpustats['sys'] = "0";
+        $cpustats['intr'] = "0";
+        $cpustats['idle'] = "0";
+    }
 
     // cpu model and count
     $cpustats['model'] = get_single_sysctl("hw.model");