diff --git a/roles/debian/tasks/main.yml b/roles/debian/tasks/main.yml
index cf25d0e..19e265d 100644
--- a/roles/debian/tasks/main.yml
+++ b/roles/debian/tasks/main.yml
@@ -47,7 +47,8 @@
   when: not is_proxmox
   copy:
     dest: /etc/network/interfaces
-    content: 'source /etc/network/interfaces.d/*'
+    content: |
+      source /etc/network/interfaces.d/*
   notify: reload interfaces
 
 # for Proxmox the main interfaces file will define bridges