diff --git a/roles/helm-template/tasks/main.yaml b/roles/helm-template/tasks/main.yaml
index 6eb052aae..78c4873f6 100644
--- a/roles/helm-template/tasks/main.yaml
+++ b/roles/helm-template/tasks/main.yaml
@@ -11,7 +11,7 @@
 - name: Deploy templated charts
   shell: |
     set -o pipefail
-    helm template {% if helm_values_file %}--values {{ helm_values_file }} {% endif %}-n {{ helm_release_name }} {{ helm_chart }} | kubectl apply -f-
+    helm template {% if helm_values_file is defined %}--values {{ helm_values_file }} {% endif %}-n {{ helm_release_name }} {{ helm_chart }} | kubectl apply -f-
   args:
     executable: /bin/bash
     chdir: "{{ zuul_work_dir }}"