diff --git a/html/includes/functions.inc.php b/html/includes/functions.inc.php
index f653dc8a0..a95ea99ac 100644
--- a/html/includes/functions.inc.php
+++ b/html/includes/functions.inc.php
@@ -271,10 +271,13 @@ STATE;
 
 function print_percentage_bar($width, $height, $percent, $left_text, $left_colour, $left_background, $right_text, $right_colour, $right_background)
 {
+
+  if($percent > "100") { $size_percent = "100"; } else { $size_percent = $percent; }
+
   $output = '
 <div style="font-size:11px;">
   <div style=" width:'.$width.'px; height:'.$height.'px; background-color:#'.$right_background.';">
-    <div style="width:'.$percent.'%; height:'.$height.'px; background-color:#'.$left_background.'; border-right:0px white solid;"></div>
+    <div style="width:'.$size_percent.'%; height:'.$height.'px; background-color:#'.$left_background.'; border-right:0px white solid;"></div>
     <div style="vertical-align: middle;height: '.$height.'px;margin-top:-'.($height).'px; color:#'.$left_colour .'; padding-left :4px;"><b>'.$left_text.'</b></div>
     <div style="vertical-align: middle;height: '.$height.'px;margin-top:-'.($height).'px; color:#'.$right_colour.'; padding-right:4px;text-align:right;"><b>'.$right_text.'</b></div>
   </div>
diff --git a/includes/discovery/mempools/screenos.inc.php b/includes/discovery/mempools/screenos.inc.php
index 5a7fc0f55..b10f1bb76 100755
--- a/includes/discovery/mempools/screenos.inc.php
+++ b/includes/discovery/mempools/screenos.inc.php
@@ -7,8 +7,8 @@ if ($device['os'] == "screenos")
   echo("ScreenOS: ");
 
   $used = snmp_get($device, ".1.3.6.1.4.1.3224.16.2.1.0", "-OvQ");
-  $total = snmp_get($device, ".1.3.6.1.4.1.3224.16.2.2.0", "-OvQ");
-  $free = $total - $used;
+  $free = snmp_get($device, ".1.3.6.1.4.1.3224.16.2.2.0", "-OvQ");
+  $total = $free + $used;
 
   $percent = $used / $total * 100;
 
@@ -17,4 +17,4 @@ if ($device['os'] == "screenos")
     discover_mempool($valid_mempool, $device, 0, "screenos", "Memory", "1", NULL, NULL);
   }
 }
-?>
\ No newline at end of file
+?>