diff --git a/common/oauth2-proxy/components/istio-external-auth-patches/patches/cm.enable-oauth2-proxy.yaml b/common/oauth2-proxy/components/istio-external-auth-patches/patches/cm.enable-oauth2-proxy.yaml
index 256d1bc7f4..683a29a011 100644
--- a/common/oauth2-proxy/components/istio-external-auth-patches/patches/cm.enable-oauth2-proxy.yaml
+++ b/common/oauth2-proxy/components/istio-external-auth-patches/patches/cm.enable-oauth2-proxy.yaml
@@ -10,6 +10,9 @@ data:
       discoveryAddress: istiod.istio-system.svc:15012
       proxyMetadata: {}
       tracing: {}
+    defaultProviders:
+      metrics:
+      - prometheus
     enablePrometheusMerge: true
     rootNamespace: istio-system
     tcpKeepalive: