diff --git a/charts/ingress-nginx/templates/_helpers.tpl b/charts/ingress-nginx/templates/_helpers.tpl
index 26c3693f2..df11e3f7a 100644
--- a/charts/ingress-nginx/templates/_helpers.tpl
+++ b/charts/ingress-nginx/templates/_helpers.tpl
@@ -35,7 +35,7 @@ Allow the release namespace to be overridden for multi-namespace deployments in
 */}}
 {{- define "ingress-nginx.namespace" -}}
   {{- if .Values.namespaceOverride -}}
-    {{- .Values.namespaceOverride -}}
+    {{- .Values.namespaceOverride | trunc 63 | trimSuffix "-" -}}
   {{- else -}}
     {{- .Release.Namespace -}}
   {{- end -}}