diff --git a/alertmanager.kubeVersion b/alertmanager.kubeVersion
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/charts/alertmanager/templates/_helpers.tpl b/charts/alertmanager/templates/_helpers.tpl
index 827b6ee9f7da..b2c4f5cfc0a9 100644
--- a/charts/alertmanager/templates/_helpers.tpl
+++ b/charts/alertmanager/templates/_helpers.tpl
@@ -24,6 +24,13 @@ If release name contains chart name it will be used as a full name.
 {{- end }}
 {{- end }}
 
+{{/*
+Get KubeVersion removing pre-release information.
+*/}}
+{{- define "alertmanager.kubeVersion" -}}
+  {{- default .Capabilities.KubeVersion.Version (regexFind "v[0-9]+\\.[0-9]+\\.[0-9]+" .Capabilities.KubeVersion.Version) -}}
+{{- end -}}
+
 {{/*
 Create chart name and version as used by the chart label.
 */}}