--- charts-original/templates/_helpers.tpl
+++ charts/templates/_helpers.tpl
@@ -118,7 +118,15 @@
 Check the ingress controller version tag is at most three versions behind the last release
 */}}
 {{- define "isControllerTagValid" -}}
-{{- if not (semverCompare ">=0.27.0-0" .Values.controller.image.tag) -}}
+{{- if not (semverCompare ">=0.27.0-0" (trimPrefix "nginx-" .Values.controller.image.tag)) -}}
 {{- fail "Controller container image tag should be 0.27.0 or higher" -}}
 {{- end -}}
 {{- end -}}
+
+{{- define "system_default_registry" -}}
+{{- if .Values.global.systemDefaultRegistry -}}
+{{- printf "%s/" .Values.global.systemDefaultRegistry -}}
+{{- else -}}
+{{- "" -}}
+{{- end -}}
+{{- end -}}