diff --git a/charts/gatekeeper/templates/gatekeeper-controller-manager-poddisruptionbudget.yaml b/charts/gatekeeper/templates/gatekeeper-controller-manager-poddisruptionbudget.yaml
index 609270a92de..d760eb9b06d 100644
--- a/charts/gatekeeper/templates/gatekeeper-controller-manager-poddisruptionbudget.yaml
+++ b/charts/gatekeeper/templates/gatekeeper-controller-manager-poddisruptionbudget.yaml
@@ -13,7 +13,17 @@ metadata:
   name: gatekeeper-controller-manager
   namespace: '{{ .Release.Namespace }}'
 spec:
-  minAvailable: {{ .Values.pdb.controllerManager.minAvailable }}
+  minAvailable: {{- if and .Values.maxAvailable .Values.maxUnavailable }}
+        {{ fail "Only one of 'maxAvailable' or 'maxUnavailable' can be set, but not both" }}
+        {{- else if not (or .Values.maxAvailable .Values.maxUnavailable) }}
+        {{ fail "One of 'maxAvailable' or 'maxUnavailable' must be set" }}
+        {{- else }}
+        {{ if .Values.maxAvailable }}
+        maxAvailable: {{ .Values.maxAvailable }}
+        {{ else if .Values.maxUnavailable }}
+        maxUnavailable: {{ .Values.maxUnavailable }}
+        {{ end }}
+        {{- end }}
   selector:
     matchLabels:
       app: '{{ template "gatekeeper.name" . }}'