diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml
index 28c47d313..7391b4bf7 100644
--- a/config/manager/manager.yaml
+++ b/config/manager/manager.yaml
@@ -32,7 +32,7 @@ spec:
         - containerPort: 9440
           name: healthz
           protocol: TCP
-        - containerPort: ${CAPG_DIAGNOSTICS_PORT:=8443}
+        - containerPort: 8443
           name: metrics
           protocol: TCP
         readinessProbe: