diff --git a/glances/outputs/static/js/services/plugins/glances_processlist.js b/glances/outputs/static/js/services/plugins/glances_processlist.js
index 701bc996..0d459262 100644
--- a/glances/outputs/static/js/services/plugins/glances_processlist.js
+++ b/glances/outputs/static/js/services/plugins/glances_processlist.js
@@ -34,7 +34,7 @@ glancesApp.service('GlancesPluginProcessList', function($filter, GlancesPlugin)
                 }
             }
 
-            process.isNice = process.nice !== undefined && ((data['system'].os_name === 'Windows' && nice != 32) || (!data['system'].os_name === 'Windows' && process.nice != 0));
+            process.isNice = process.nice !== undefined && ((data['system'].os_name === 'Windows' && nice != 32) || (data['system'].os_name !== 'Windows' && process.nice != 0));
 
             this.processes.push(process);
         }