diff --git a/docs/node-mixin/config.libsonnet b/docs/node-mixin/config.libsonnet
index 8cf9860f..b25c3939 100644
--- a/docs/node-mixin/config.libsonnet
+++ b/docs/node-mixin/config.libsonnet
@@ -9,13 +9,13 @@
     // empty, all filesystems are selected. If you have unusual
     // filesystem you don't want to include in dashboards and
     // alerting, you can exclude them here, e.g. 'fstype!="tmpfs"'.
-    fsSelector: '',
+    fsSelector: 'fstype!=""',
 
     // Select the device for disk-related queries. If left empty, all
     // devices are selected. If you have unusual devices you don't
     // want to include in dashboards and alerting, you can exclude
     // them here, e.g. 'device!="tmpfs"'.
-    diskDeviceSelector: '',
+    diskDeviceSelector: 'device!=""',
 
     // Some of the alerts are meant to fire if a critical failure of a
     // node is imminent (e.g. the disk is about to run full). In a
diff --git a/docs/node-mixin/dashboards/use.libsonnet b/docs/node-mixin/dashboards/use.libsonnet
index da66427b..8463ab95 100644
--- a/docs/node-mixin/dashboards/use.libsonnet
+++ b/docs/node-mixin/dashboards/use.libsonnet
@@ -280,9 +280,9 @@ local g = import 'grafana-builder/grafana.libsonnet';
           g.queryPanel(|||
             1 -
             (
-              max without (mountpoint, fstype) (node_filesystem_avail_bytes{%(nodeExporterSelector)s, %(fsSelector)s, instance="$instance"}})
+              max without (mountpoint, fstype) (node_filesystem_avail_bytes{%(nodeExporterSelector)s, %(fsSelector)s, instance="$instance"})
             /
-              max without (mountpoint, fstype) (node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, instance="$instance"}})
+              max without (mountpoint, fstype) (node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, instance="$instance"})
             )
           ||| % $._config, '{{device}}') +
           {