diff --git a/stable/prometheus/Chart.yaml b/stable/prometheus/Chart.yaml
index 51e8b343fe..35fe024a44 100755
--- a/stable/prometheus/Chart.yaml
+++ b/stable/prometheus/Chart.yaml
@@ -1,5 +1,5 @@
 name: prometheus
-version: 5.1.1
+version: 5.1.2
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/
 icon: https://raw.githubusercontent.com/prometheus/prometheus.github.io/master/assets/prometheus_logo-cb55bb5c346.png
diff --git a/stable/prometheus/templates/node-exporter-daemonset.yaml b/stable/prometheus/templates/node-exporter-daemonset.yaml
index db04c0749f..041edb972f 100644
--- a/stable/prometheus/templates/node-exporter-daemonset.yaml
+++ b/stable/prometheus/templates/node-exporter-daemonset.yaml
@@ -34,7 +34,11 @@ spec:
             - --path.procfs=/host/proc
             - --path.sysfs=/host/sys
           {{- range $key, $value := .Values.nodeExporter.extraArgs }}
+          {{- if $value }}
             - --{{ $key }}={{ $value }}
+          {{- else }}
+            - --{{ $key }}
+          {{- end }}
           {{- end }}
           ports:
             - name: metrics