diff --git a/charts/tidb-drainer/templates/_helpers.tpl b/charts/tidb-drainer/templates/_helpers.tpl
index 516fe402ba4..49c13cabec7 100644
--- a/charts/tidb-drainer/templates/_helpers.tpl
+++ b/charts/tidb-drainer/templates/_helpers.tpl
@@ -1,5 +1,5 @@
 {{- define "drainer.name" -}}
-{{- if .Values.drainerName }}
+{{- if .Values.drainerName -}}
 {{ .Values.drainerName }}
 {{- else -}}
 {{ .Values.clusterName }}-{{ .Release.Name }}-drainer