diff --git a/reboot.yml b/reboot.yml
index 02fbe4e..ee7ef47 100755
--- a/reboot.yml
+++ b/reboot.yml
@@ -8,6 +8,6 @@
       stat: path=/var/run/reboot-required
       register: s
     - name: reboot
-      reboot: reboot-timeout=300
+      reboot: reboot_timeout=300
       when: s.stat.exists
       become: yes