diff --git a/homeassistant/components/ai_task/services.yaml b/homeassistant/components/ai_task/services.yaml
index 4298ab62a07..194c0e07bc3 100644
--- a/homeassistant/components/ai_task/services.yaml
+++ b/homeassistant/components/ai_task/services.yaml
@@ -10,6 +10,7 @@ generate_data:
       required: true
       selector:
         text:
+          multiline: true
     entity_id:
       required: false
       selector: