diff --git a/deploy/charts/cert-manager/templates/rbac.yaml b/deploy/charts/cert-manager/templates/rbac.yaml
index 24c8ef7c0..194f18351 100644
--- a/deploy/charts/cert-manager/templates/rbac.yaml
+++ b/deploy/charts/cert-manager/templates/rbac.yaml
@@ -213,14 +213,12 @@ rules:
   - apiGroups: ["extensions"]
     resources: ["ingresses"]
     verbs: ["get", "list", "watch", "create", "delete", "update"]
-{{- if .Values.global.isOpenshift }}
   # We require the ability to specify a custom hostname when we are creating
   # new ingress resources.
   # See: https://github.com/openshift/origin/blob/21f191775636f9acadb44fa42beeb4f75b255532/pkg/route/apiserver/admission/ingress_admission.go#L84-L148
   - apiGroups: ["route.openshift.io"]
     resources: ["routes/custom-host"]
     verbs: ["create"]
-{{- end }}
   # We require these rules to support users with the OwnerReferencesPermissionEnforcement
   # admission controller enabled:
   # https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#ownerreferencespermissionenforcement
diff --git a/deploy/charts/cert-manager/values.yaml b/deploy/charts/cert-manager/values.yaml
index 93e8fbb28..5efb68e1a 100644
--- a/deploy/charts/cert-manager/values.yaml
+++ b/deploy/charts/cert-manager/values.yaml
@@ -6,7 +6,6 @@ global:
   ## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
   ##
   imagePullSecrets: []
-  isOpenshift: false
   # - name: "image-pull-secret"
 
   # Optional priority class to be used for the cert-manager pods
diff --git a/deploy/manifests/BUILD.bazel b/deploy/manifests/BUILD.bazel
index 255185811..019062b71 100644
--- a/deploy/manifests/BUILD.bazel
+++ b/deploy/manifests/BUILD.bazel
@@ -14,9 +14,7 @@ VARIANTS = {
     "cert-manager-no-webhook": {
         "webhook.enabled": "false",
     },
-    "cert-manager-openshift": {
-        "global.isOpenshift": "true",
-    },
+    "cert-manager-openshift": {},
 }
 
 [helm_tmpl(