diff --git a/templates/services/droneci_autoscaler_compose.yml.j2 b/templates/services/droneci_autoscaler_compose.yml.j2
index 5a23a41..306e1ab 100644
--- a/templates/services/droneci_autoscaler_compose.yml.j2
+++ b/templates/services/droneci_autoscaler_compose.yml.j2
@@ -7,7 +7,7 @@ services:
     container_name: {{ inst.name }}
     image: {{ droneci_autoscaler_image }}
     restart: {{ droneci_autoscaler_restart_policy }}
-    {% if inst.exposed_ports | default(droneci_autoscaler_exposed_ports) | lenght > 0 %}
+    {% if inst.exposed_ports | default(droneci_autoscaler_exposed_ports) | length > 0 %}
     ports:
       {% for port in inst.exposed_ports | default(droneci_autoscaler_exposed_ports) %}
       - {{ port | quote }}