diff --git a/roles/config-ntp/tasks/main.yaml b/roles/config-ntp/tasks/main.yaml
index 5dad8bb..123fa5c 100644
--- a/roles/config-ntp/tasks/main.yaml
+++ b/roles/config-ntp/tasks/main.yaml
@@ -38,7 +38,15 @@
     owner: root
     group: root
     mode: '0644'
-  notify: restart systemd-timesyncd
+- name: retocar fichero /etc/systemd/timesyncd.conf
+  lineinfile:
+    path: /etc/systemd/timesyncd.conf
+    regexp: '^#?FallbackNTP='
+    line: "FallbackNTP=ntp.roa.es"
+    owner: root
+    group: root
+    mode: '0644'
+  notify: restart systemd-timesyncd  
 # service should start on boot.
 - name: service should start on boot
   service: