diff --git a/prometheus/files/exporter.systemd.jinja b/prometheus/files/exporter.systemd.jinja
index e9bc1c6..fe89e6b 100644
--- a/prometheus/files/exporter.systemd.jinja
+++ b/prometheus/files/exporter.systemd.jinja
@@ -1,5 +1,5 @@
 [Unit]
-{%- if description %}
+{%- if description is defined%}
 Description=Prometheus {{ description }}
 {%- else %}
 Description=Prometheus {{ svc }} Exporter