diff --git a/jsonnet/kube-prometheus/addons/custom-metrics.libsonnet b/jsonnet/kube-prometheus/addons/custom-metrics.libsonnet
index 8ac49885..d2357f4f 100644
--- a/jsonnet/kube-prometheus/addons/custom-metrics.libsonnet
+++ b/jsonnet/kube-prometheus/addons/custom-metrics.libsonnet
@@ -4,7 +4,6 @@
 {
   values+:: {
     prometheusAdapter+: {
-      namespace: $.values.prometheusAdapter.namespace,
       // Rules for custom-metrics
       config+:: {
         rules+: [