diff --git a/files/system-monitor-graph@mount/desklet.js b/files/system-monitor-graph@mount/desklet.js
index 00d6170..5aa9dee 100644
--- a/files/system-monitor-graph@mount/desklet.js
+++ b/files/system-monitor-graph@mount/desklet.js
@@ -863,6 +863,11 @@ SystemMonitorGraph.prototype = {
             // get IO utilization of partition
             let dev_fs = df_values[0];
             let fs = dev_fs.split(/\/+/)[2];
+            try {
+                fs = GLib.file_read_link(dev_fs).split(/\/+/)[1];
+            }
+            catch (e) {
+            }
             let re = new RegExp(fs + '.+');
             // https://stackoverflow.com/questions/4458183/how-the-util-of-iostat-is-computed
             this.cpu_file.load_contents_async(null, (file, response) => {