diff --git a/configuration/automations/3d-printer.yaml b/configuration/automations/3d-printer.yaml
index 45d63b0..de44905 100644
--- a/configuration/automations/3d-printer.yaml
+++ b/configuration/automations/3d-printer.yaml
@@ -135,8 +135,7 @@
   mode: single
   trigger:
     - platform: state
-      entity_id:
-        - sensor.octoprint_target_tool0_temp
+      entity_id: sensor.octoprint_target_tool0_temp
       to: "0"
   condition:
     - condition: numeric_state